Electric Power Calculation
Wattage of Household Devices
Calculate the power consumption of common household appliances. Enter the voltage and current to determine the wattage (P = V × I).
Incandescent Light Bulb
LED Television
Microwave Oven
The Science Behind Power Calculation
Ohm's Law:
Power (P) in watts is calculated by multiplying voltage (V) in volts by current (I) in amperes:
P = V × I
Typical Values:
- Standard household voltage: 120V (US) or 230V (EU)
- Light bulb: ~0.5A (60W) to ~1A (120W)
- TV: ~0.5A to ~2A (60W to 240W)
- Microwave: ~5A to ~10A (600W to 1200W)
Energy Consumption:
Energy = Power × Time. A 100W device running for 10 hours consumes 1 kilowatt-hour (kWh).
