LIGHTWATTAGE CALCULATOR
Bulb Wattage Calculator
Calculate bulb wattage from voltage and current or enter a known wattage to estimate energy use and electricity costs.
Calculation Method
Bulb Specifications
Example: 120 V or 230 V
Enter the current drawn by the bulb.
Use 1.00 if the power factor is unknown.
Energy Consumption
Average number of hours the bulb operates each day.
Number of operating days per month.
Enter your electricity price per kWh.
Select the currency used for your electricity rate.
