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Electricity Consumption Calculator
Estimate an appliance's electricity use and optional cost over the selected period. Your data is processed in your browser.
How to use
- Enter power in watts.
- Enter daily hours and days.
- Optionally enter the kWh price, then calculate.
How it works
Power is divided by 1,000 and multiplied by hours and days. Cost is consumption multiplied by price.
Notes and limitations
- The calculation assumes constant power and usage.
- Tiered rates, taxes, losses, and standby use are excluded.
Frequently asked questions
Is the kWh price required?
No. Without it, only consumption is shown.