Appliance electricity cost calculator
Calculate the hourly, daily, monthly, and annual cost of any electrical appliance using its wattage, runtime, and your own electricity rate.
Transparent method
The calculation
Cost = watts ÷ 1,000 × active hours × electricity rateUse this general model for devices with reasonably stable power draw, including televisions, computers, kitchen appliances, pumps, lighting, and workshop tools.
Read the full methodology →Sensitivity check
Run three scenarios.
01
Light useReduce daily runtime to model occasional use.
02
Typical useUse your normal weekly schedule and the label wattage.
03
Heavy useIncrease runtime or quantity to test a demanding month.
Use the result well
What can change the answer?
- Labels may show maximum rather than typical power.
- Time-of-use tariffs require separate peak and off-peak runs.
- Fixed utility charges are not attributed to one appliance.