DECISION GUIDE
Gaming PC Electricity Cost Calculator
Gaming PC power varies with the CPU, GPU, frame-rate cap, monitor, game and idle time.
Direct answer: At the editable 500 W preset, 4 hours per day, and 70% average active load, a gaming PC uses 1.40 kWh per day and costs about $7.74 per 30-day month or $94.23 per year. Measure wall draw for a system-specific result.
Editable estimate
Calculate and compare
Results update as you type.
kW × effective runtime × rate. Effective runtime = hours/day × duty cycle.
Baseline vs scenario
Compare two annual energy-use estimates.
Old vs new appliance payback
Use annual kWh for both models. Leave rebate at $0 unless you have a confirmed amount.
Simple payback = net upfront cost ÷ annual electricity-cost savings. Excludes financing, maintenance, rate changes and time value of money.
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Ways to lower this cost
See all savings tips →WORKLOAD CHANGES THE ANSWER
Compare illustrative 300 W, 500 W, and 700 W loads
These examples assume 4 scheduled hours per day at 70% average active load and the U.S. average rate. They are editable scenarios, not claims about every gaming computer.
| Illustrative system load | Daily energy | Monthly cost | Yearly cost |
|---|---|---|---|
| 300 W | 0.84 kWh | $4.65 | $56.54 |
| 500 W | 1.40 kWh | $7.74 | $94.23 |
| 700 W | 1.96 kWh | $10.84 | $131.92 |
Idle, desktop work, and gaming draw differ with the CPU, GPU, frame-rate cap, game, resolution, and power settings. A PSU rating is capacity, not actual wall draw. Add monitor power separately if you want a complete setup estimate.
ENERGY STAR computer guidance explains why power settings and equipment choices matter.
Gaming PC electricity quick answers
How much does a gaming PC cost to run per month?
The current 500 W editable example costs about $7.74 per 30-day month at 4 hours per day and 70% average load.
Does a 700 W PSU mean the PC uses 700 W?
No. The PSU rating is its capacity. Actual wall draw varies by idle and gaming workload, components, efficiency, and settings.
Should monitor electricity be included?
Include monitor wattage as a separate measured load when estimating the complete gaming setup.
How do idle and gaming time affect cost?
Model them as separate scenarios when accuracy matters, then add their energy use. Long idle time can matter even when its wattage is lower.
RATE COMPARISON
How your rate changes the cost
Same appliance inputs, using May 2026 EIA residential averages.
Make the estimate more accurate
- Use a wall meter instead of the PSU rating.
- Add monitor wattage for the complete setup.
- Frame-rate limits and sleep settings can reduce use.
Presets are estimates. Use your model label, an EnergyGuide annual-kWh figure or a safe meter reading when available. Compare old and new appliance payback.