calculators
Energy Consumption Calculator
Estimate daily and total energy consumption in kWh from power, hours per day, and days of use. Optional cost estimation.
Quick answer
Energy Consumption Calculator is a free online tool that helps you estimate energy usage and optional cost. Estimate daily and total energy consumption in kWh from power, hours per day, and days of use. Optional cost estimation.
Energy Consumption Calculator FAQ
How is energy calculated?
Energy (kWh) = Power (kW) x Hours. For example, a 1.5kW device running 4 hours uses 6kWh.
What is a kilowatt-hour?
A kilowatt-hour (kWh) is the unit electricity companies use for billing. It represents 1000 watts used for 1 hour.
Is cost estimation exact?
No. It is an estimate based on the rate you enter. Actual consumption can vary with device behavior, duty cycle, and measurement conditions.