All calculators
305 of 305 calculators
Length Converter
Convert length and distance between every common unit. Free, instant, accurate.
Weight & Mass Converter
Convert weight and mass between every common unit. Free, instant, accurate.
Volume Converter
Convert volume and capacity between every common unit. Free, instant, accurate.
Area Converter
Convert area between every common unit. Free, instant, accurate.
Speed Converter
Convert speed and velocity between every common unit. Free, instant, accurate.
Pressure Converter
Convert pressure between every common unit. Free, instant, accurate.
Energy Converter
Convert energy between every common unit. Free, instant, accurate.
Data Storage Converter
Convert digital storage (bytes, KB, MB, GB, TB, KiB, MiB) between every common unit. Free, instant, accurate.
Temperature Converter
Convert temperatures between Celsius, Fahrenheit and Kelvin instantly.
Concrete Volume Calculator
Work out concrete volume in m³ or yd³ plus how many bags you need for any slab, footing or column.
Brick & Block Count Calculator
Estimate the number of bricks or blocks needed for any wall, including a waste allowance.
Roof Pitch Calculator
Convert roof pitch between rise/run, degrees and ratio. Get rafter length from span.
Rebar Weight Calculator
Calculate the weight of reinforcing steel bar from diameter and length.
Pipe Volume Calculator
Calculate the internal volume of any pipe in litres or gallons.
Flow Rate Calculator
Convert between L/min, L/s, GPM (US) and GPM (UK) instantly.
Ohm's Law Calculator
Solve for voltage, current, resistance or power given any two of V, I, R or P.
Voltage Drop Calculator
Estimate voltage drop along a copper or aluminium cable run for any load.
kWh Energy Cost Calculator
Work out the running cost of any appliance from wattage, usage and price per kWh.
Torque Converter (Nm ↔ ft-lb)
Convert torque between Newton-metres, foot-pounds, inch-pounds and kgf·m.
MPG ↔ L/100km Converter
Convert fuel economy between US MPG, UK MPG and L/100km.
Paint Coverage Calculator
Work out how many litres or gallons of paint you need for a room or wall.
Mulch & Topsoil Calculator
Calculate cubic metres or cubic yards of mulch, topsoil or gravel for any bed.
Recipe Scaler
Scale any recipe up or down for a different number of servings.
Oven Temperature Converter
Convert oven temperatures between °C, °F and gas marks.
BMI Calculator
Calculate your Body Mass Index from height and weight.
BMR & TDEE Calculator
Estimate Basal Metabolic Rate and Total Daily Energy Expenditure.
Running Pace Calculator
Convert between pace per km, pace per mile and overall race finish time.
Mortgage Calculator
Monthly mortgage payment, total interest and amortisation summary.
Compound Interest Calculator
Project savings growth with regular contributions and compounding interest.
Loft Conversion Floor Cost Calculator
Estimate the cost of laying a new floor in a loft conversion — chipboard, laminate or engineered oak — with materials, labour, joists and insulation.
Roof Area from Pitch Calculator
Calculate true sloped roof area from the plan footprint and pitch.
Shingle Bundle Calculator
How many bundles of asphalt shingles you need for a given roof area.
Gutter & Downpipe Calculator
Estimate gutter run, downpipes and brackets needed for a house.
Tile Quantity Calculator
Tile count for a floor or wall with adhesive and grout estimates.
Laminate / Vinyl Plank Calculator
Number of plank packs to order for a floor area.
Board Feet Calculator
Convert lumber dimensions to board feet for pricing hardwood.
Room BTU / AC Sizing Calculator
How many BTU/h of cooling or heating your room needs.
Duct CFM & Size Calculator
Required airflow and duct diameter for a room.
Heat Loss / Boiler Size Calculator
Quick whole-house heat loss for boiler or heat pump sizing.
Solar Panel Count Calculator
Number of panels for a target annual generation.
Battery Bank Sizing Calculator
Battery storage to cover overnight or off-grid loads.
Solar Payback Calculator
Years to pay back a solar PV system from electricity savings.
Pool Volume Calculator
Pool water volume in litres and US gallons.
Pool Chlorine Dose Calculator
How much chlorine to add to reach the target free-chlorine level.
Pool Heater Sizing Calculator
BTU heater output to raise pool temperature within X hours.
Seed Rate Calculator
Total seed needed for a field at a given sowing rate.
NPK Fertilizer Calculator
Bags of fertilizer to apply N, P, K targets to a field.
Irrigation GPM / LPM Calculator
Required pump flow to deliver an irrigation depth in a given time.
Cleaning Time & Quote Calculator
Estimate cleaning hours and price by room type and frequency.
Carpet Cleaning Cost Calculator
Quote a carpet cleaning job by room and condition.
Catering Portion Calculator
Food quantities by headcount for buffets and plated service.
Food Cost % / Menu Pricing Calculator
Price a dish from raw ingredient cost using a target food cost %.
Event Drinks Quantity Calculator
Beer, wine and spirits to order for an event.
Ink Coverage / Job Cost Calculator
Ink consumption and cost for a digital print run.
Booklet Page Imposition Calculator
Sheets and signatures for saddle-stitched and perfect-bound booklets.
Hyperfocal & Depth of Field Calculator
Hyperfocal distance for maximum sharpness front-to-back.
Photography Shoot Quote Calculator
Quote a photo or video shoot covering time, edit, and licensing.
Moving Truck Size Calculator
Recommended truck size from your home or load size.
Packing Box Calculator
Number of small, medium and large boxes needed per home size.
Margin / Markup Calculator
Convert between cost, selling price, markup % and margin %.
Break-Even Units Calculator
How many units to sell to cover fixed costs.
Dimensional Weight / Shipping Cost
Dimensional weight and likely carrier billable weight.
ROAS / Ad ROI Calculator
Return on ad spend and break-even ROAS at your margin.
CAC / LTV Ratio Calculator
Lifetime value vs customer acquisition cost — the SaaS health metric.
CTR, CPC & CPM Calculator
Convert between CTR, CPC, CPM and impressions for any ad set.
Target Hourly Rate Calculator
Hourly rate to hit your salary goal as a freelancer.
Freelance Project Quote Calculator
Quote a fixed-price project with buffer and revisions baked in.
Wood Stain & Varnish Coverage
Litres of stain or varnish for a deck, fence or piece of furniture.
Welding Rod Consumption Calculator
Kilograms of stick electrode for a weld of given length and bead.
Shielding Gas Consumption Calculator
Argon or CO₂ used in a MIG welding job.
Filament Weight & Cost Calculator
Weight, length and cost of filament from a slicer estimate.
3D Print Time & Energy Cost
Electricity cost for a long print and idle vs heated bed power.
Venue Capacity & Seating Calculator
Maximum guest count by layout for a given venue area.
Wedding Budget Allocator
Suggested budget split across venue, catering, photo, attire and extras.
Table & Seating Plan Calculator
Number of round / long tables needed and aisle space.
Dog Food Daily Calculator
Daily food in grams from your dog's weight and activity.
Aquarium Volume & Stocking Calculator
Aquarium volume and a rough stocking estimate by 'inch per gallon'.
Rental Yield Calculator
Gross and net rental yield for a buy-to-let property.
Cap Rate / NOI Calculator
Capitalization rate and net operating income for commercial property.
BRRRR Cash-on-Cash Calculator
Cash invested vs cash recovered after refinancing a rehab project.
Plasterboard Sheet Calculator (EU sizes)
Plasterboards needed for a wall or ceiling — 1200×2400 mm or 1200×2500 mm standard EU sheets.
External Render Mix Calculator
Sand, cement and lime for a sand:cement:lime external render at 15 mm thickness.
Floor Screed Volume Calculator
Sand-cement or liquid screed volume and weight for a floor.
Loft Insulation Roll Calculator
Mineral-wool roll count for loft insulation to UK 270 mm building-regs depth.
Window Glazing Area & U-value Cost Calculator
Glass area for a window and annual heat-loss cost by U-value (EU energy ratings).
Scaffold Hire Cost Calculator
Estimate cost for scaffolding hire by linear metres, lifts and weeks.
Chimney Flue Size & Sweep Cost Calculator
Recommended flue diameter for a stove and typical sweep cost.
Thatch Bundle Calculator (Norfolk Reed)
Bundles of Norfolk reed or long straw needed to thatch a roof.
Stone Wall Tonnage Calculator
Tonnes of building stone needed for a dry-stone or pointed stone wall.
Carpet Fitting Cost Calculator
Carpet area, underlay, gripper and fitting cost for a room (EU 4 m / 5 m roll widths).
Kitchen Fitting Cost Calculator
Cabinet units, worktop and fitting cost for a kitchen run.
Bathroom Refit Cost Calculator
Suite, tiling and fitting cost for a UK/EU bathroom refurb.
Turf Roll Calculator
Rolls of turf needed to lay a new lawn (EU 1 m² rolls).
Tree Felling Cost Estimator
Cost of felling a tree based on height, access and waste removal.
Garden Fence Panel Calculator (UK 6ft)
Number of panels, posts and concrete for a UK garden fence.
Block Paving Calculator (200×100 EU)
Block count, sand and cement for a 200×100 mm block-paved driveway.
Pond Liner Calculator
EPDM/butyl liner size for a garden pond.
Honey Yield Estimator
Honey harvest per hive based on colony strength and forage.
Wine ABV from Specific Gravity
Alcohol % from starting and final specific gravity readings.
Beer Recipe ABV & IBU Calculator
Estimate ABV and IBU for a homebrew batch.
Cheese Yield from Milk
Expected cheese yield from a batch of milk by cheese type.
Croissant Butter Ratio Calculator
Détrempe and tourage butter for a French croissant batch.
Carcass Meat Yield Calculator
Saleable meat yield from a beef, pork or lamb carcass.
Bouquet Pricing Calculator
Wholesale-to-retail bouquet pricing using EU florist markup (3×).
Fabric Metres Calculator
Fabric needed for a garment based on type, size and fabric width.
Sofa Re-upholstery Fabric Calculator
Metres of fabric to re-cover a sofa by seater count and pattern.
Gold Karat & Value Calculator
Pure-gold content and scrap value by karat (EU hallmarks: 375/585/750/916).
Perfume Dilution Calculator
EDP, EDT and EDC blending ratios from a fragrance concentrate.
Cold-Process Soap Lye Calculator
Sodium hydroxide (NaOH) needed for a cold-process soap batch.
Candle Wax Weight Calculator
Soy or paraffin wax weight to fill a batch of jars.
Clay Shrinkage Calculator
Fired size from greenware dimensions for stoneware or earthenware.
Forge Coal/Coke Consumption
Blacksmith coke or coal needed per session.
Glass Gob Weight Calculator
Hot-glass weight needed for a blown piece by finished volume.
Book Spine Width & Paper Calculator
Spine width and paper weight for perfect-bound books (EU GSM).
Window Cleaning Quote
Quote a window-clean job by window count, storey and frequency.
Dry-Cleaning Load & Solvent
Perchloroethylene or hydrocarbon solvent needed per machine load.
Lock Change Cost (UK/EU)
Cost to change a euro-cylinder or UK Yale-style lock.
Bicycle Gear Ratio & Development
Gear ratio and metres-per-revolution for a chainring/sprocket combo.
EV Charging Cost & Time (EU)
Time and cost to charge an EV from % to % at a given kW rate and €/kWh.
Air-Source Heat Pump Sizing
Heat pump kW size and annual running cost for a UK/EU home.
Combi Boiler Size Calculator (UK)
Recommended combi boiler kW by radiators, bathrooms and property size.
Firewood Stere & Cord Calculator
Convert between stere (m³), cord and weight of seasoned hardwood.
Solar Thermal Hot Water Sizing
Flat-plate collector area for a household's hot water demand (EU).
Rainwater Harvesting Tank Sizing
Annual harvest and tank size from roof area and EU rainfall.
EU VAT Calculator
Add or remove VAT at any EU member-state rate.
IBAN Validator (EU)
Validate an IBAN (International Bank Account Number) using the mod-97 check.
UK Stamp Duty (SDLT) Calculator
England & NI SDLT for a residential purchase (2025 thresholds).
EU Appliance Energy Cost Calculator
Annual running cost from an EU energy-label kWh/year figure.
Holiday Let Occupancy & Revenue
Annual revenue from an EU gîte / agriturismo by nightly rate, season and occupancy.
Exhibition Stand Cost Calculator (EU)
Total cost of an EU trade-show stand by m², build and staffing.
Truffle Orchard Yield Calculator
Estimate kg of truffles per year from inoculated oaks/hazels by species (Périgord, Burgundy, summer).
Saffron Farm — Bulbs & ROI
Bulbs needed to produce X grams of dried saffron and projected revenue at EU wholesale.
Olive → EVOO Yield Calculator
Litres of extra-virgin olive oil from a given olive harvest weight.
Jamón Ibérico Curing Calculator
Finished weight, curing time and value of a fresh ham leg through dry-curing.
Champagne Riddling (Remuage) Planner
Pupitres, cellar floor area and dégorgement timing for a riddling batch.
Buffalo Mozzarella Yield Calculator
Litres of buffalo milk required for X kilos of mozzarella di bufala DOP.
Cognac Angel's Share Calculator
Remaining volume and ABV after years of barrel ageing — the part lost to evaporation.
Aceto Balsamico Solera Cascade
Annual bottling volume from a traditional Modena 5-barrel cascade.
Parmigiano Reggiano Wheels from Milk
Wheels of Parmigiano produced from a daily milk volume and the herd needed to supply it.
Peat Bog Brick Yield (Ireland/Scotland)
Hand-cut peat bricks (turf) and kWh equivalent from a bog area at given depth.
Heather Honey — Hives per Moor
How many hives a heather moor can sustain and expected honey yield.
Snail Farm (Heliciculture) Sizing
Stocking density, edible weight and revenue for a Helix aspersa snail farm.
Lavender → Essential Oil Distillation
Millilitres of essential oil from fresh lavender flowers via steam distillation.
Indoor Wasabi Grow Calculator
Stem yield, cycle time and revenue from indoor Wasabia japonica.
Oyster Mushrooms from Spent Coffee Grounds
Mushroom yield from spent coffee grounds — circular-economy grow kit.
French Autoroute Toll Estimator
Approximate péage cost for a French motorway journey by vehicle class.
ULEZ / CAZ Daily Charge Projection
Annual cost of driving a non-compliant vehicle in London ULEZ or an EU CAZ zone.
Swiss Motorway Vignette Cost
Annual Swiss vignette + Austrian Vignette + Slovenia Vinjeta for cross-Alpine drives.
Channel Crossing — Ferry vs Eurotunnel
Compare Dover–Calais ferry against Folkestone–Calais Eurotunnel on cost and time.
Interrail Pass Break-Even
How many trips before an Interrail / Eurail pass beats point-to-point tickets.
EU Coach vs Train — Cost & CO₂
Compare FlixBus / Eurolines against high-speed rail on price and carbon.
EU Drone Class & Operator Fee
Which EU drone category (A1/A2/A3) applies and what paperwork/fees it triggers.
Pheasant Shoot Day Cost (Per Gun)
Driven game shoot price per gun including tips and gun-bus.
Livery Yard Cost (DIY vs Full)
Annual livery cost for a horse — DIY, part or full livery in the UK/EU.
Dressage Arena Surface (20×60 m)
Sand, fibre and rubber tonnage for a 20×60 m FEI dressage arena.
Hedgelaying — Stakes & Binders
Stakes and binders needed for a traditional Midland or Welsh laid hedge.
Hazel Coppice Yield (Per Hectare)
Annual yield from a rotationally-coppiced hazel woodland.
Willow Basket — Withies Required
Bundles of Salix viminalis withies for a basket project.
Shepherding — Lambs & EU/UK Subsidy
Lamb crop and basic-payment subsidy from a flock of breeding ewes.
Alpaca Fleece → Yarn Skeins
How much spinnable yarn a herd of alpacas produces per shearing.
Cheese Affinage Cave Sizing
Cave volume and humidity-control load for affinage of cheese wheels.
Cure #1 / Cure #2 Safety Calculator
Grams of pink curing salt and resulting nitrite ppm — staying inside EU/USDA safe limits.
Raclette Night — Portions Calculator
Cheese, charcuterie and potatoes per guest for a Swiss/Savoyard raclette dinner.
Swiss Fondue Moitié-Moitié Calculator
Cheese, wine and kirsch quantities for a Gruyère-Vacherin fondue.
Basque Tapas / Pintxos — Per Guest
Pintxos, raciones and txakoli per guest for a Basque-country gathering.
Oktoberfest — Sausage & Beer Order
Sausages, pretzels and litres of Festbier for an Oktoberfest-style event.
Paella Pan Diameter → Portions
Portion count, bomba rice and saffron from a paella pan's diameter.
Breton Crêpe Batter Calculator
Flour, milk, eggs and butter for buckwheat galettes or wheat crêpes by guest count.
Bakery Batch — Focaccia per Oven
Trays, dough weight and oven cycles to produce a focaccia batch.
Amsterdam Houseboat Mooring Cost
Annual mooring fee, insurance and BTW (VAT) for a houseboat in central Amsterdam.
Venice Acqua Alta Floor-Raise Cost
Cost to raise a ground floor in Venice / Chioggia by N cm to stay above acqua alta.
EU Deposit Return — Pfand / Statiegeld
Annual refund from returning bottles & cans under Germany Pfand or NL Statiegeld.
Sedum Green Roof Loading
Saturated weight of a sedum or biodiverse green roof — for structural sign-off.
Nordic Sauna Firewood per Year
Stere of birch firewood for a wood-fired sauna at N sessions per week.
Geothermal Underfloor Heating Demand
Annual kWh demand for geothermal underfloor heating in Iceland / Nordic climates.
Norway EV Toll & Ferry Savings
Annual toll-and-ferry savings of an EV vs petrol car under Norwegian discount rules.
German Rolladen — Shutter Box Sizing
Roller shutter box, slat length and motor torque for a Rolladen install.
Velux Rooflight Daylight Sizing
Velux size and quantity to hit 2% daylight factor for a loft room.
Passivhaus Heat-Demand Check
Quick PHPP-style check: is your annual heating demand inside the 15 kWh/m²a Passivhaus limit?
Cork Oak (Quercus suber) Extraction
Kilos of cork bark and revenue from a Portuguese montado / Spanish dehesa.
Vivarium Heat & UV Calculator
Basking-lamp wattage and UVB tube length for a reptile enclosure by species and vivarium volume.
Scuba SAC / Gas Planning
Surface Air Consumption and remaining bottom time from tank size, depth and SAC rate.
Tattoo Session Price
Session cost from size, style, artist rate and shop minimum.
Gel Manicure Cost & Margin
Per-client cost of a gel manicure from consumable use and lamp electricity.
Escape Room Revenue & Payback
Weekly revenue and payback period from slot pricing, group size and utilisation.
Podcast Storage & Bandwidth
Monthly hosting bandwidth and storage from episode length, bitrate and downloads.
Vinyl Pressing Cost per Unit
Per-unit cost of a vinyl run including plating, jackets and shipping.
Vending Machine Route Profit
Weekly profit per machine from vend price, COGS and restock time.
Ski & Snowboard Wax Calculator
Grams of ski wax needed for a set of skis or a board by temperature and length.
Sauna Heater kW Sizing
Kiuas (sauna heater) kW rating and stone weight from cabin volume.
Heat Pump ROI & Payback (EU)
Annual savings and payback period for an air-source heat pump vs your existing gas/oil boiler at local electricity and fuel tariffs.
Scaffolding Estimator
Standards, ledgers, transoms and boards needed to sheet a facade of a given length and height (metric tube-and-fitting).
Tile & Flooring Waste Calculator
Boxes of tiles or packs of flooring required, including a breakage/cut-waste buffer.
EU VAT Cross-Border Calculator
Net/gross split, VAT amount and OSS reporting flag for a cross-border B2C sale inside the EU.
Solar Panel Break-Even
Payback period for a rooftop PV array from local peak sun hours, electricity tariff and export price.
Concrete Volume & Bag Estimator
Cubic metres (or yards) of ready-mix concrete for a slab or foundation, including a waste factor.
EV Total Cost of Ownership (5-year)
5-year TCO of an electric vehicle including purchase, charging, servicing, insurance, tax and depreciation vs an ICE comparator.
Small Farm Grant Estimator
Estimated annual income from environmental land actions (UK SFI, EU CAP eco-schemes, Countryside Stewardship equivalents).
Construction Bid & Profit Estimator
Turn materials, labour hours and target margin into a defensible bid price with burdened labour cost.
Sustainable Materials Footprint
Embodied CO₂e of a build from the mass of common structural and finishing materials (ICE database cradle-to-gate factors).
Business Loan Amortization Calculator
Monthly payment, total interest and full amortization schedule for a business term loan.
Heat Pump Savings Calculator
Annual running cost and $/€ savings of an air-source heat pump versus your existing gas, oil, LPG or electric-resistance heating.
Concrete Formwork Pressure Calculator
Maximum lateral pressure on wall or column formwork from the ACI 347 / CIRIA 108 method, based on pour rate, concrete temperature and mix type.
Rental Yield & Cap Rate Calculator
Gross yield, net yield and capitalization rate for a residential or commercial rental — with cash-on-cash return if you use a mortgage.
Crop Nutrient & Fertilizer Mix Calculator
Kilograms of N, P₂O₅ and K₂O required for your field — and the bag count for a chosen NPK blend.
Production Throughput (OEE) Calculator
Overall Equipment Effectiveness — Availability × Performance × Quality — plus the good units per shift for a production line.
Staircase Rise & Run Calculator
Number of risers, tread depth, stair angle and total run for a stair that fits your floor-to-floor height, checked against UK Part K / IRC codes.
Margin & Markup Estimator
Convert between cost, margin, markup and selling price — plus the break-even units and gross profit at your target margin.
Food Cost % & Menu Price Calculator
Food cost percentage of a dish and the menu price required to hit your target food-cost ratio — the industry standard for menu engineering.
Freelance Hourly Rate Calculator
The hourly rate a freelancer must charge to hit a take-home salary target, after taxes, expenses, holidays and non-billable time.
EU Carbon Footprint Tracker (Scope 1-2-3)
GHG Protocol style corporate carbon footprint in tCO₂e for EU CSRD / ESRS E1 disclosure — Scope 1 fuels, Scope 2 electricity and Scope 3 upstream categories.
Remote Team Salary & Cost Converter
Convert a home-country salary to fair local pay in another country using cost-of-living parity, then add employer on-costs (social security, holiday, benefits) for the true fully-loaded cost.
EU VAT Reverse Charge Calculator
Determine whether a B2B intra-EU or cross-border supply falls under the reverse-charge mechanism, and produce the correct invoice figures for both supplier and buyer.
Scaffolding Compliance & Load Estimator (EN 12811 / TG20)
Classify a scaffold to EN 12811-1 load class, check working platform capacity and produce a NASC TG20:21 compliance summary before erection.
Crop Yield vs. Fertilizer ROI Calculator
Economic optimum nitrogen rate (EONR) and marginal ROI for cereal, oilseed and root crops — models the yield-response curve and stops at the point where the last kg of N no longer pays for itself.
SaaS Burn Rate & Runway Calculator
Monthly gross and net burn, months of runway, default-alive check, and the ARR growth rate needed to hit default-alive before cash runs out — the metrics every SaaS board reviews.
Cross-Border Shipping & Import Duty Estimator
Landed cost for a cross-border B2C or B2B shipment: freight, insurance, customs duty by HS heading, import VAT and de-minimis check — including the EU €150 IOSS threshold and post-Brexit UK rules.
Renewable Energy Subsidy & Grant Estimator
Estimate the capital grant, feed-in tariff or tax credit available for a rooftop solar, heat pump, battery or EV charger install across major EU schemes, UK BUS/ECO4 and the US IRA 25D/45L credits.
Event Budget & Capacity Planner
Full P&L for a ticketed event: venue capacity by layout, catering per head, staff ratios, breakeven ticket count and profit at target load.
Customs Clearance & Brokerage Fee Estimator
All-in customs clearance cost for an import: brokerage entry fee, per-line HS classification, ENS/ICS2 filing, disbursement fee, and origin/preference document handling — for road, air and sea freight.
Metal Stud & Track Partition Calculator
Calculate metal tracks, studs, noggins, fixings, plasterboard and estimated material cost for an internal partition wall.
Brewing & Winemaking ABV + Sugar Adjustment Calculator
ABV from hydrometer readings (OG / FG) with the sugar addition needed to hit a target ABV — works for beer, wine, cider and mead.
Plasterboard / Drywall Sheet Optimizer
Sheet count, waste factor, screws, tape and joint compound for a wall or ceiling area — supports EU 1200×2400/2500/3000 mm and US 4×8/4×10/4×12 ft boards.
Greenhouse Climate & Heating Requirement Calculator
Peak heat loss (kW) and annual heating energy (kWh) for a horticultural greenhouse — sizes the boiler/heater and estimates the fuel bill for glass, twin-wall polycarbonate or single-poly houses.
Drone Flight Regulatory Compliance Check (EU EASA + UK CAA + FAA Part 107)
Classify your drone flight to the correct EU EASA Open category subcategory (A1/A2/A3), UK CAA equivalent or FAA Part 107 rules, and list the pilot certificates, distances and no-fly checks you must satisfy before take-off.
Deck & Paving Sub-base Material Volume Calculator
MOT Type 1 / crushed stone, sharp sand and geotextile quantities for a patio, driveway, path or shed base — plus compacted vs loose volume conversion.
Social Media Engagement ROI Calculator
True ROI of a social campaign — accounting for organic reach, paid boost, engagement rate, click-through, conversion rate and average order value across Instagram, TikTok, LinkedIn, X and Facebook.
Houseboat & Marina Mooring Fee Calculator
Annual, monthly and short-stay mooring costs for a canal boat, yacht or houseboat — accounting for boat length, marina tier, electricity, water, pump-out, winter storage and liveaboard surcharge.
Artisanal Cheese Yield & Maturation Time Calculator
Milk-to-cheese yield, drained curd weight, aged weight after maturation losses and the cave time needed to reach a target style for cow, goat and sheep milk.
Event Catering Portion & Waste Calculator
Portion sizes, total food weight to order, plate-waste allowance and disposal cost for a plated dinner, buffet, canapé reception or BBQ — with dietary breakdown (vegetarian, vegan, gluten-free) and food-waste hierarchy.
Custom Furniture Timber & Material Cost Estimator
Timber board-feet or m³, sheet goods, hardware, finish and shop-time for a bespoke furniture build — with margin, retail price and delivery add-on.
Compound Interest & Wealth Projection Calculator
Project long-term wealth from a starting balance, recurring contributions and an annual return, with year-by-year compounding.
Inflation-Adjusted Purchasing Power Calculator
See what a sum of money today will be worth in future purchasing power — and how much you'd need in the future to buy the same basket today.
Debt Avalanche vs Snowball Payoff Strategy Calculator
Compare Avalanche (highest APR first) vs Snowball (smallest balance first) payoff on up to five debts — see months saved and interest saved.
Rental Property ROI & Cash-on-Cash Return Calculator
Analyse a buy-to-let property: cash flow, cap rate, cash-on-cash return, GRM and total ROI including mortgage principal paydown.
NPV & IRR Business Investment Calculator
Discount up to 6 years of projected cash flows to Net Present Value, and solve for the Internal Rate of Return of the investment.
Stock/ETF Investment Expense Ratio Impact Calculator
See how much of your future wealth is eaten by ETF or mutual-fund expense ratios — compare a low-cost index fund against a higher-cost active fund side by side.
Small Business 12-Month Cash Flow Forecast
Simple rolling 12-month cash flow forecast: opening balance, monthly inflows, fixed costs, variable costs and growth rate — see when you run out of cash.
Credit Score Improvement & Impact Simulator
Estimate how specific actions — paying down balances, closing cards, opening a new account, or adding a late payment — will move your FICO / VantageScore.
Retirement Nest Egg & Savings Gap Calculator
How big does your retirement portfolio need to be, and are you on track? Uses the 4% safe withdrawal rate and adjusts for inflation.
Dividend Reinvestment (DRIP) Growth Calculator
Model long-term wealth growth from a dividend-paying stock or ETF with automatic dividend reinvestment, including dividend growth over time.
Whole Build & Extension Planner — Cost, Timeline & Build Order
Plan a house extension or a whole new house: realistic 2026 UK cost, three budget scenarios, materials vs labour, and a week-by-week build timeline in the order the work must happen.
Fireplace, Fuel & Room Heating Calculator
Compare wood, coal, pellets, gas, LPG, oil and charcoal by useful heat, room-temperature rise, carbon output and indoor air-quality risk.
Car & Van Carbon Footprint Calculator
Estimate CO2 from any car or van worldwide — petrol, diesel, hybrid, LPG or electric, by engine size (litres or kW), age and distance in km or miles — and see how many trees offset it.
Age Calculator
Find an exact age, age on another date, estimated birth date, and the next birthday countdown.
AI Food Photo Calorie Estimator
Photograph a meal to identify each food and repeated piece, estimate weight ranges, calories, protein, carbohydrates, and fat, then correct portions instantly.
Camera Room Measurement & Materials Calculator
Measure a room, detect windows and doors from wall photos, preview proportions in 3D, and price flooring, paint, plasterboard and metal-stud materials.
AI Face Age Estimator (18+)
Upload or take a face photo to get a playful visual age range estimate. Adults only, explicit consent required, and the photo is never stored.
Roof Tile & Replacement Materials Calculator
Count roof tiles, battens, membrane, ridge tiles and fixings for a full re-roof or a partial repair, with waste and an optional cost estimate.
Percentage Change Calculator
Calculate percentage increase, decrease, difference and reverse percentages.
Date Difference Calculator
Calculate days, weeks, months and weekdays between two dates.
Time Duration Calculator
Add, subtract and compare hours, minutes and seconds.
Trip Fuel Cost Calculator
Estimate trip fuel, total cost, cost per passenger, and carbon emissions.
Discount & Sale Price Calculator
Calculate sale price, savings, stacked discounts, tax and reverse original price.
Pregnancy Due Date Calculator
Estimate a due date and current pregnancy week from the last menstrual period or conception date.
Daily Water Intake Calculator
Estimate daily fluid needs from weight, activity, climate, pregnancy and breastfeeding.
Body Surface Area Calculator
Calculate body surface area using Mosteller, Du Bois and Haycock formulas.
Oven & Hob Installation Fair Price
Realistic time and fixed price to remove an old oven or hob and fit, connect and test a new one.
Radiator Replacement Fair Price
Price and time for swapping or adding radiators, valves and refilling the system.
Patio Paving Fair Price
Fixed price for digging out, sub-base, laying and pointing a new patio by m² and slab type.
Block Paving Driveway Fair Price
Whole-job price for a block paved or resin driveway with excavation, base and edging.
Concrete Base & Slab Fair Price
Price for a shed, garage or garden-room concrete base with formwork, membrane and mesh.
Single-Storey Extension Fair Price
Realistic build time and whole-job price for a single-storey rear or side extension.
Internal Door Hanging Fair Price
Time and fixed price to hang internal doors with hinges, latch and handles.
Bathroom Refit Fair Price
Whole-job price and days to strip out and refit a bathroom including tiling and plumbing.
Garden Fence Installation Fair Price
Fixed price per run of fencing with posts, panels and gravel boards.
Gutter Clean & Replacement Fair Price
Price for clearing, repairing or fully replacing gutters and downpipes.
Consumer Unit (Fuse Box) Upgrade Fair Price
Fixed price to replace a fuse box with a modern consumer unit including testing and certificate.
Combi Boiler Replacement Fair Price
Whole-job price for replacing a boiler including flue, filter, flush and commissioning.
Laminate & Wood Floor Fitting Fair Price
Price per room for laying laminate, LVT or engineered wood with underlay and trims.
Plastering & Skimming Fair Price
Fixed price to skim or re-plaster walls and ceilings by m².
Stud Partition Wall Fair Price
Price to build, insulate, board and finish a new internal stud wall.
Decking Installation Fair Price
Whole-job price for building timber or composite decking with frame and handrail.
Window Replacement Fair Price
Price and fitting time for replacing double or triple glazed windows.
Exterior House Painting Fair Price
Fixed price for painting render, masonry or cladding on a whole house.
Room Decorating Fair Price
Price to paint walls, ceiling and woodwork in a room — the whole job, not hourly.
Tree Surgery & Stump Removal Fair Price
Fixed price for pruning, felling or grinding out a tree stump.
Roof Leak Repair Fair Price
Price for common roof repairs: slipped tiles, flashing, ridge re-pointing.
Loft Insulation Fair Price
Price to top up loft insulation to 270–300 mm, optionally with boarding.
Kitchen Worktop Fitting Fair Price
Price to cut and fit laminate, wood or stone worktops including sink and hob cut-outs.
Wall Tiling & Splashback Fair Price
Fixed price to tile a kitchen splashback or bathroom wall by m² and tile size.
Home EV Charger Installation Fair Price
Price to install a 7 kW home car charger including cabling, protection and commissioning.
Shed Demolition & Garden Clearance Fair Price
Price to dismantle a shed or clear garden waste and take everything away.
Toilet, Basin & Tap Replacement Fair Price
Fixed price for swapping a toilet, basin, taps or a shower mixer.
Kitchen Fitting Fair Price
Whole-job labour and days for fitting a new kitchen by number of units.
Garage Conversion Fair Price
Whole-job price and weeks on site to turn an attached or integral garage into a habitable room.
Loft Conversion Fair Price
Realistic weeks and fixed price for a Velux, dormer or hip-to-gable loft conversion.
House Rewiring Fair Price
Full or partial rewire: realistic days, first and second fix, consumer unit and certificate.
Damp Proofing Fair Price
Fair price for damp treatment — injection DPC, tanking or simply fixing the cause.
House Rendering Fair Price
Time and fixed price for sand-cement, silicone or monocouche render including scaffold.
Wall Knock-Through & Steel Beam Fair Price
Removing a load-bearing wall: propping, steel beam, padstones, making good and sign-off.
Shower Installation Fair Price
Fitting an electric, mixer or walk-in shower with tray, screen and waterproofing.
Carpet Fitting Fair Price
Labour and materials to lift old carpet and fit new carpet, underlay and grippers.
Garden Wall Fair Price
Building a brick or block garden wall with footings, coping and realistic bricklaying rates.
Artificial Grass Fair Price
Dig-out, sub-base, membrane and laying artificial turf at a fixed price.
Turfing Fair Price
Preparing soil and laying new rolled turf — realistic time and fixed price.
Resin Driveway Fair Price
Resin-bound driveway over new or existing base: dig-out, base, edging and resin.
Drain Unblocking Fair Price
Fair call-out price for clearing a blocked sink, toilet or outside drain, with CCTV if needed.
Worktop Resealing & Silicone Fair Price
Re-oiling wood worktops or replacing tired silicone around sinks, baths and showers.
Porch Build Fair Price
Building a small front porch with base, brick or timber walls, roof and door.
Conservatory Roof Replacement Fair Price
Replacing a polycarbonate conservatory roof with glass or a solid insulated roof.
Chimney Breast Removal Fair Price
Removing a chimney breast with support (gallows brackets or steel), making good and sign-off.
Cooker Hood / Extractor Fitting Fair Price
Fitting a cooker hood or bathroom extractor fan, ducting and wiring at one price.
Solar Panel Installation Fair Price
Fair fixed price for rooftop solar PV, inverter and optional battery, with MCS sign-off.
Air Source Heat Pump Fair Price
Whole-job price for an air source heat pump, cylinder and radiator upgrades.