Home server running-cost calculator

Watts × hours × your electricity price. Pick a model from the database or type your own reading.

kWh per year
Cost per month
Cost per year

Rule of thumb: every 1 W running 24/7 is 8.76 kWh a year, so multiply your price per kWh by 8.76 per watt. Find your rate on your utility bill.

The HomelabWatts monthly

New measurements, the most efficient builds, and the occasional deal on frugal hardware. One email a month.

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