Ohm's Law Calculator
Solve for voltage, current, resistance or power given any two of V, I, R or P.
Result
- Voltage (V)
- 0
- Current (A)
- 0
- Resistance (Ω)
- 0
- Power (W)
- 0
V = I × R, P = V × I
Electrical calculators
Ohm's law, voltage drop, wire gauge, conduit fill and energy cost.
Voltage Drop Calculator
Estimate voltage drop along a copper or aluminium cable run for any load.
Result
- Voltage drop (V)
- 4.48
- Drop (%)
- 1.948
- Within 3% limit?
- Yes
Vd = 2 × L × I × ρ / A
kWh Energy Cost Calculator
Work out the running cost of any appliance from wattage, usage and price per kWh.
Result
- Energy used (kWh)
- 240
- Total cost
- 67.2
- Annual (extrapolated)
- 817.6