Gaming PC electricity cost
The number on the power supply is a ceiling, not a reading. What a gaming PC actually pulls at the wall depends on the GPU under load — and it is usually less than the forum threads suggest.
Short answer at the example rate of $0.17/kWh: a typical 500 W gaming pc running 4 hours a day, 30 days a month uses about 60.0 kWh and costs $10.20 a month. Put in your own wattage, schedule and rate below — a mid-range build under gaming load draws around 300 W at the wall, a high-end card and CPU together around 500 W, and a flagship overclocked build can pass 800 W in a heavy title.
The $0.17/kWh default is a rough example rate — about the US residential average on EIA figures, and it moves over time. Type in the rate from your own electricity bill for numbers that mean anything for your home.
Gaming PC cost calculator
Low, typical and high — side by side
The default schedule is 4 hours of gaming a day, every day — a committed hobbyist, not a weekend player. Halve the hours if that is not you. All three rows use that same schedule and the $0.17/kWh example rate; only the wattage changes.
| Model size | Watts | kWh / month | Cost / month | Cost / year |
|---|---|---|---|---|
| Low end | 300 | 36.0 | $6.12 | $73.44 |
| Typical | 500 | 60.0 | $10.20 | $122.40 |
| High end | 800 | 96.0 | $16.32 | $195.84 |
Draw follows the game, not the badge
A gaming PC has at least three different appetites: 50–100 W idle on the desktop, 150–250 W in lighter or older titles and esports games at modest settings, and full draw only when a demanding game pins the GPU. The tiers above are gaming-load figures. If your hours split between gaming and browsing, run the calculator twice — once per mode — and add the results; that two-line estimate will beat any single "my PC uses X watts" claim.
The other quiet term is everything around the PC: monitor, speakers, the router that never sleeps. None is large alone; together they explain why a gaming corner shows up on a whole-home list even in months you barely played.
Questions
- How much does a gaming PC cost per hour?
- At 500 W wall draw, half a kWh an hour — about $0.09 at $0.17/kWh. Even a long session is cheaper than the snacks. The cost question that matters is the monthly habit: 4 hours a day is about $10 a month.
- My PSU is 850 W. Does my PC use 850 W?
- No. The PSU rating is the maximum it can deliver, not what the parts ask for. Actual draw is set by the components under load; an 850 W supply in a mid-range build might never pass 350 W. Measure with a plug-in meter if you want your own number — it is the one case where the nameplate actively misleads.
- What does leaving the PC on all day cost?
- An idle desktop with monitors asleep typically draws 50–100 W. At 80 W around the clock that is about 58 kWh and $9.80 a month — as much as the gaming itself. Sleep settings are the cheapest upgrade in this whole article.
- Do monitors count?
- Yes — a 27″ gaming monitor draws roughly 30–50 W in use. Add it to the PC’s figure if you are totalling a setup, and note the monitor keeps sipping a watt or two in standby (see the standby page).
More appliances: the main calculator and whole-home list · every preset on one chart · how the formula works