COMPUTER ENERGY CALCULATOR
Gaming PC Electricity Cost Calculator
Estimate daily, monthly, and annual electricity cost using gaming and idle power.
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LIVE CALCULATOR
Updates instantlyCombine gaming and idle power
watts
hours
watts
hours
$/kWh
Formula: Daily kWh = (gaming watts × gaming hours + idle watts × idle hours) ÷ 1,000
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How this estimate works
PC draw changes with the game, frame rate, components, monitors, and power limits.
- Use your equipment data. Check a label, specification sheet, controller, or energy meter.
- Enter your utility rate. A recent bill is more useful than a national average.
- Test different schedules. Change one input at a time to compare scenarios.
Ways to reduce or refine the cost
1
Enable sleep mode instead of leaving the PC idle.
2
Use sensible frame-rate limits and power settings.
3
Measure monitors and accessories separately.
Transparent methodology
Results use the values you enter and standard energy formulas. They are planning estimates, not bills or guarantees.
Frequently asked questions
Does a 750W power supply always use 750 watts?+
No. The rating is output capacity, not constant consumption.
Are monitors included?+
No. Add display energy separately.
How can I get a more accurate number?+
Measure average wall power during representative gaming and idle periods.
How to verify this estimate
Best input
Measure the complete setup at the outlet during real workloads.
Reality check
Separate gaming, idle, sleep, display, and accessory schedules.
Important limitation
Power-supply rating is a maximum capacity, not the computer’s continuous consumption.
Primary reference: ENERGY STAR Computers. Reviewed September 2026.