Electricity Calculators

Calculators and references for electrical work and energy bills: Ohm's law, wire gauge sizes and appliance running costs.

Calculators

Ohm's Law Calculator Enter any two of voltage, current, resistance or power to calculate the other two using Ohm's law, with the formula wheel and worked steps.

References

AWG Wire Gauge Chart American Wire Gauge (AWG) chart with diameter in mm and inches, cross-section area in mm² and copper resistance per km, calculated from the AWG formula.

Also useful

Electricity Cost Calculator What an appliance costs to run per day, month and year. Power Converter Watts, kilowatts, horsepower and BTU per hour. Energy Converter kWh, joules, calories and BTU. Voltage Converter Millivolts, volts and kilovolts.