Most electric blankets use about 50 to 200 watts while actively heating, which often works out to roughly 0.2 to 1.2 kWh/day depending on size, heat setting, and how many hours you run it.
For full system planning, use the WattSizing Calculator.
Quick Answer
If your electric blanket averages 80 W over the night and you run it 8 hours, you’ll use about 0.64 kWh/day ((80 × 8) / 1000). At $0.16/kWh, that’s about $0.10/day or $3.07/month.
Detailed Explanation
“Watts per day” really means energy per day, usually measured in kWh/day. With an electric blanket, the tricky part is that the blanket rarely draws its maximum wattage continuously. Most models cycle on and off after the bed warms up.
Your daily kWh depends on:
- Blanket size (throw/twin vs queen/king)
- Heat setting (higher settings run the heating element longer)
- Room temperature and bedding (more insulation = less cycling)
- Hours used per day
If you’re budgeting electricity for other everyday loads, you may also like How Many Watts Does a Router Use (low watts, runs all day) and How Many Watts Does a Dehumidifier Use Per Day (higher watts, longer runtime).
Watt Table
| Blanket Scenario | Typical Running Watts | Typical Starting Watts | Typical Daily Energy |
|---|---|---|---|
| Throw (4–8 hrs/day, low–med) | 50 - 100 W | 50 - 110 W | 0.20 - 0.60 kWh/day |
| Twin (6–9 hrs/day, low–med) | 60 - 120 W | 60 - 130 W | 0.30 - 0.90 kWh/day |
| Queen (7–10 hrs/day, med) | 100 - 180 W | 100 - 200 W | 0.50 - 1.30 kWh/day |
| King / dual-control (8–10 hrs/day, both sides) | 120 - 250 W | 120 - 275 W | 0.70 - 1.80 kWh/day |
| “Max heat” in a cold room (similar hours) | 150 - 300 W | 150 - 330 W | 1.00 - 2.40 kWh/day |
Calculation Example
Example: A queen blanket draws about 150 W when the heat is on, but it cycles and averages 90 W over 9 hours.
- kWh/day = (90 Ă— 9) / 1000 = 0.81 kWh/day
- At $0.16/kWh, daily cost is about $0.13/day
- Monthly cost (30 days) is about $3.89
If you want a quick “worst case” estimate, assume it runs near its rated watts continuously for the full time. For more realistic planning (and total household loads), use the WattSizing Calculator.
Tips to Reduce Power Usage
- Preheat for 15–30 minutes, then drop to low.
- Use a heavier comforter so the blanket cycles less.
- If it has an auto-off timer, use it instead of leaving it running all night.
FAQs
Why does my daily kWh differ from the label wattage?
The label is typically the maximum heating draw. Real usage depends on cycling and heat setting.
Is an electric blanket cheaper than a space heater?
Often yes for personal warmth, because it heats the bed directly rather than the whole room. But it depends on hours used and room conditions.
Should I count inverter losses for off-grid/battery use?
Yes. If you run it through an inverter, plan for extra energy use beyond the blanket’s kWh.
CTA
Want to estimate your full overnight energy use (blanket + chargers + lights + fans)? Use the WattSizing Calculator to total your kWh/day and size the right battery and solar setup.
