Wattage Calculator
Calculate Electrical Power in Watts
Power (Watts)
120.0 W
Understanding Electrical Power Calculation
How to Calculate Wattage
Electrical power (P) in watts can be calculated using three fundamental formulas:
- P = V × I (Voltage × Current)
- P = I² × R (Current² × Resistance)
- P = V² ÷ R (Voltage² ÷ Resistance)
Common Applications
Understanding wattage is crucial for:
- Selecting appropriate electrical components
- Calculating energy consumption
- Planning electrical installations
- Troubleshooting electrical circuits