Electrical Power Calculator
Calculate electrical power, voltage, current or resistance using the most common DC electrical power formulas. Simply choose what you want to calculate, enter the known values, and click Calculate.
Calculator
Available Formulas
| Formula | Description |
|---|---|
| P = V × I | Power from voltage and current |
| P = I²R | Power from current and resistance |
| P = V²/R | Power from voltage and resistance |
| V = P/I | Voltage from power and current |
| I = P/V | Current from power and voltage |
| R = V²/P | Resistance from voltage and power |
Example
Voltage = 24 V
Current = 5 A
P = 24 × 5 = 120 W
Applications
- Power supply design.
- Amplifier calculations.
- LED resistor design.
- Battery systems.
- Solar installations.
- Automotive electronics.
- Electrical troubleshooting.