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Power cost calculator

Enter the power draw in watts, the daily runtime and your electricity price. The calculator shows consumption, cost and CO₂ – calculated in your browser, no data is sent anywhere.

Examples

Result

Consumption per year
–
Cost per day
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Cost per month
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Cost per year
–
CO₂ per year (approx.)
–

Frequently asked questions

How do I measure power draw?

Best with a metering smart plug (e.g. Zigbee/Matter). Use the average over several hours, not the peak at switch-on.

Which electricity price should I enter?

The per-kWh rate from your contract (gross). The base fee is independent of consumption and does not belong in the calculation.

How is CO₂ calculated?

With a rough 0.38 kg CO₂ per kWh (German grid mix). With green power the value is lower.