About Calcora

Calcora is a directory of free, accurate calculators and unit converters for every industry — from pouring concrete to mortgage repayments to baking sourdough.

What makes us different: where it makes sense, every calculator includes a real cost estimate. Pick budget, standard or premium materials and see how the total changes — including the trap where the cheapest paint actually costs more once you factor in extra coats and labour.

How we make money

• Display ads (auto-hidden for Premium users)
• Regional sponsors — one local tradesperson per industry per region
• Affiliate links on relevant tools and materials
• An optional ad-free Premium tier with pro features for estimators

All cost numbers are starting points — get 2–3 local quotes before committing.