Watt Hours Calculator
Free calculate energy consumption in watt-hours from power and time. determine energy usage for electrical devices and appliances.
Input Parameters
Results
Enter power and time to calculate energy
Energy Formula
Energy Equation
E = P × t
Where E = energy (watt-hours), P = power (watts), t = time (hours)
Common Examples
- • 100W × 1 hour = 100 Wh
- • 1 kW × 1 hour = 1 kWh
- • Used for electricity bills