Electrical Power Calculator

The Electrical Power Calculator helps you quickly calculate power and energy using standard electrical formulas. Whether you’re working on electronics projects, power systems, or basic circuit calculations, this tool gives accurate results instantly.

Power Formula (P = V × I)

Power in a circuit can be calculated using voltage and current:

• P (Power) = Watts (W)
• V (Voltage) = Volts (V)
• I (Current) = Amperes (A)

This method is commonly used in DC circuits and basic electrical calculations.

Power Formula (P = I²R)

Another way to calculate power is using current and resistance:

• P = I² × R

This is useful when voltage is not directly known but current and resistance are available.

Energy Calculation (Wh / kWh)

When time is included, the calculator also computes energy consumption:

• Energy (E) = Power × Time
• Watt-hour (Wh)
• Kilowatt-hour (kWh)

1 kWh = 1000 Wh

This is especially useful for estimating electricity usage and battery consumption.