Volt Watt Ampere Conversion Calculator

Calculate electrical power relationships between voltage, wattage, and amperage. Enter any two values to calculate the third.

Voltage (V):

Wattage (W):

Amperage (A):

3-Phase Power (uses √3 multiplier for line-to-line voltage)

How to use: Enter any two values (voltage, wattage, or amperage) and click Calculate to find the third value. Check the 3-Phase box for three-phase power calculations.

Calculated ResultsSingle-Phase

Voltage Calculated:

Wattage Calculated:

Amperage Calculated:

Formulas used (Single-Phase):
Voltage (V) = Wattage (W) / Amperage (A)
Wattage (W) = Voltage (V) × Amperage (A)
Amperage (A) = Wattage (W) / Voltage (V)