Updated August 24, 2026
Gaming PC Electricity Cost Calculator
Calculate how much your gaming PC costs to run per session, month, and year. Enter real power draw, hours of use, and your electricity price.
Live calculator
Calculate your actual running cost
Running this gaming pc for 4 hours a day, 7 days a week uses about 54.6 kWh each month.
Quick answer
How much does a gaming pc cost to run?
A 450 W Gaming PC used for 4 hours a day, 7 days a week, consumes about 54.6 kWh per month. At £0.2611 per kWh (Ofgem GB illustration for Jul–Sep 2026), that is approximately £14.26 per month. Replace these example figures with the wattage and electricity rate from your appliance and bill.
What changes the real running cost?
A gaming PC rarely uses its power supply's full rated capacity. The best estimate comes from measured wall power during the games or workloads you use most.
Include the monitor wattage for a complete setup estimate. A 750 W power supply does not mean the PC continuously consumes 750 W.
Assumptions used in this example
This page starts with 450 watts, 4 hours of use per day, and 7 days per week. Those defaults are only a practical starting point. Replace them with the number on your product label, energy label, smart plug, or electricity bill.
Example Gaming PC costs
These examples use 450 W for 4 hours a day and 7 days per week.
| Electricity rate | Per hour | Per month | Per year |
|---|---|---|---|
| £0.20 / kWh | £0.09 | £10.92 | £131.04 |
| £0.26 / kWh | £0.12 | £14.26 | £171.07 |
| £0.35 / kWh | £0.16 | £19.11 | £229.32 |
Ways to reduce the cost
Start with changes that reduce active runtime without compromising safety or the job the appliance needs to do.
- Cap frame rates when extra frames are not useful.
- Use sleep mode during breaks.
- Measure actual wall power with a plug-in meter.
Estimate only. Actual consumption varies by model, setting, condition, temperature, duty cycle, and tariff. Use a plug-in meter or energy-label figure when accuracy matters.
FAQ
Gaming PC running cost questions
How do I calculate Gaming PC running cost?
Divide the watts by 1,000 to get kilowatts, multiply by the hours used, then multiply by your electricity price per kWh. This page pre-fills 450 W, 4 hours per day, and 7 days per week as a starting example.
How much does a Gaming PC cost per hour?
At 450 W and £0.2611 per kWh (an Ofgem GB cap illustration), the example cost is about £0.12 per hour while it is actively using that power. Change the rate field to match your own bill.
Why might my real Gaming PC cost be different?
Include the monitor wattage for a complete setup estimate. A 750 W power supply does not mean the PC continuously consumes 750 W.
Should I use rated watts or measured watts?
Rated watts are useful for a quick estimate, but measured wall power or an energy-label kWh figure is usually more accurate because many appliances cycle on and off or change power during use.
Does the calculator include standing charges, taxes, or demand charges?
No. The calculator estimates usage cost from kWh only. If your bill includes standing charges, taxes, delivery fees, or demand charges, add those separately.
Can I share my result?
Yes. Use the share or copy button after entering your wattage, hours, days, rate, and currency. The page stores those inputs in the URL so you can revisit the same estimate.