Power Calculator
Calculate watts, amperes, voltage, energy consumption and costs
What do you want to calculate?
Power (W)
Current (A)
Voltage (V)
Energy (kWh)
Cost ($)
Voltage (V)
*
Current (A)
*
Power (W)
Time (hours)
Rate ($/kWh)
Calculate
Clear
Power Formulas
Power:
P = V × I
Current:
I = P ÷ V
Voltage:
V = P ÷ I
Energy:
E = P × T ÷ 1000
Cost:
Cost = E × Rate
Units
P:
Power (Watts)
V:
Voltage (Volts)
I:
Current (Amperes)
T:
Time (Hours)
E:
Energy (kWh)
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