Laptops draw 25–65 watts while in use and 5–15 watts sleeping, with battery charging adding 5–10 watts. Most users see negligible monthly energy costs from laptop operation alone.
| Basis | Cost |
|---|---|
| Per hour (while running, 60 W typical) | $0.011 |
| Per day (8 h/day, 5/7 days) | $0.065 |
| Per month | $1.97 |
| Per year | $23.58 |
| Hourly range (small 30 W – large 100 W) | $0.006 – $0.019 |
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