kWh (kilowatt-hour) is a unit of energy. 1 kWh equals 1000W used for 1 hour. Electricity bills are based on kWh consumed.

1. Enter appliance wattage (W). 2. Enter daily usage hours and days per month. 3. Enter electricity rate per kWh to calculate costs.

Standby power also affects bills. Unplug unused appliances. Using energy-efficient products helps save electricity.