Electricity Calculator
Calculate electrical values using Ohm's Law, energy costs, wire sizing, and power factor analysis
Calculation Type
Choose the type of electrical calculation
Basic Electrical Calculations
Enter any two values to calculate the others using Ohm's Law and power formulas
Electrical Formulas
Ohm's Law
V = I × R
I = V / R
R = V / I
Power Formulas
P = V × I
P = I² × R
P = V² / R
Energy & Cost
Energy (kWh) = Power (kW) × Hours
Cost = Energy × Rate
Wire Gauge Reference
14 AWG15A Max
12 AWG20A Max
10 AWG30A Max
8 AWG50A Max
6 AWG65A Max