Electrical Unit Converter
Convert between volts, amps, watts, kWh, and other electrical units.
Free converter
Electrical Unit Converter
Convert between amps, volts, watts, Ah, Wh, and kWh — every everyday solar and electrical unit in one tool.
Enter any two known values and the tool calculates the rest.
System or battery voltage
Load or charge current
V × A = Watts
Battery amp-hours
Ah × V = Wh
Wh ÷ 1000
Voltage— V
Current— A
Power— W
Capacity— Ah
Energy— Wh
Energy— kWh
Quick reference formulas
| Find | Formula |
|---|---|
| Watts | Volts × Amps |
| Amps | Watts ÷ Volts |
| Volts | Watts ÷ Amps |
| Wh (watt-hours) | Ah × Volts |
| kWh | Wh ÷ 1000 |
| Ah from kWh | kWh × 1000 ÷ Volts |
Basic Ohm’s law and energy conversions. For AC circuits, factor in power factor (see our kVA ↔ Watts Converter).