Electrical Power Calculator
Calculate electrical power (P), voltage (V), current (I), or resistance (R) using power formulas. Enter any two known values to find the missing ones.
Power Calculation Formulas
P = V × I
Power = Voltage × Current
P = I² × R
Power = Current² × Resistance
P = V² / R
Power = Voltage² / Resistance
About Electrical Power
Electrical power is the rate at which electrical energy is transferred by an electric circuit. It is measured in watts (W), where one watt equals one joule per second.
Power Formulas:
- P = V × I - Power equals voltage times current
- P = I² × R - Power equals current squared times resistance
- P = V² / R - Power equals voltage squared divided by resistance
Applications:
- Calculating energy consumption of electrical devices
- Sizing electrical components and circuits
- Determining heat dissipation requirements
- Electrical system design and analysis
- Energy efficiency calculations
Power Units:
- Watt (W) - Base unit of power
- Kilowatt (kW) - 1,000 watts
- Megawatt (MW) - 1,000,000 watts
- Horsepower (HP) - 745.7 watts