Estimate energy consumption from watts, kilowatts, amps, voltage, runtime, quantity, duty cycle, and days used. This calculator shows daily, monthly, yearly kWh, energy cost, and comparison load estimates.
Power input:
The calculator uses watts, kilowatts, amps and volts, or known kWh to estimate energy consumption.
Runtime:
Hours per day, days per month, months per year, quantity, and duty cycle are applied to estimate daily, monthly, and yearly kWh.
Cost:
Energy use is multiplied by your electric rate to estimate daily, monthly, and yearly energy cost.
An energy consumption calculator helps estimate how much electricity a device, appliance, room, shop, EV charger, or building load uses over time.
It can help compare appliances, estimate energy bills, plan solar or battery loads, check EV charging use, and understand how runtime affects electricity usage.
Your result shows daily kWh, monthly kWh, yearly kWh, kilowatts, watts, cost per day, cost per month, cost per year, runtime, duty cycle, quantity, and comparison load estimates.
Divide watts by 1,000 to get kilowatts, then multiply by the number of hours used. For longer periods, multiply by days or months.
kW measures power. kWh measures total energy consumed over time.
A 1,000 watt device is 1 kW. If it runs for 8 hours, it uses 8 kWh.
Real usage can vary because equipment cycles on and off, runs at partial power, has standby draw, or operates under changing conditions.