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PC and gaming PC electricity cost calculator

PC and gaming PC electricity cost calculator: Energy in kWh is not power in W or kW.

Your result

Complete the fields and calculate.

Calculation method and formula

Average power draw [W] ÷ 1000 × Use per day [h] × Use days per month × Electricity price per kWh

Understand the inputs

Average power draw
Unit: W. Minimum 0. Use a measured value or your own assumption.
Use per day
Unit: Std.. Minimum 0. Use a measured value or your own assumption.
Use days per month
Minimum 0. Maximum 31. Use a measured value or your own assumption.
Electricity price per kWh
Minimum 0. Use a measured value or your own assumption.

Assumptions and limitations

Energy in kWh is not power in W or kW. Use measured average power or the stated annual consumption; include standby and fixed charges separately when supported.

The formula uses the specified units. Displayed numbers are rounded; whole packs, item counts and full time periods may also be rounded within the calculation.

Worked example

Illustrative values. Replace them with your own inputs for your calculation.

Average power draw
450 W
Use per day
4 h
Use days per month
30
Electricity price per kWh
0.35
Example result18.9 per month

Monthly use: 54 kWh.

Model revision: October 17, 2026 · How CleverCalc works

FAQ

Frequently asked questions

How does PC and gaming PC electricity cost calculator work?+

Average power draw [W] ÷ 1000 × Use per day [h] × Use days per month × Electricity price per kWh. Energy in kWh is not power in W or kW. Use measured average power or the stated annual consumption; include standby and fixed charges separately when supported.

What assumptions should I consider for this result?+

Energy in kWh is not power in W or kW. Use measured average power or the stated annual consumption; include standby and fixed charges separately when supported. The formula uses the specified units. Displayed numbers are rounded; whole packs, item counts and full time periods may also be rounded within the calculation.

How accurate is the result?+

The formula uses the specified units. Displayed numbers are rounded; whole packs, item counts and full time periods may also be rounded within the calculation. Prices, measurements and model assumptions determine how well the result represents your situation.

Is this calculator free?+

Yes. Calculations and PDF export work without an account or registration.

What happens to my inputs?+

Calculations run in your browser. Results are saved locally only when you add them to My results; favourites and history are also local. Shared links contain your values. The currency tool requests the selected currencies from its rate provider without sending your amount.

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