How much does it cost to run an electric blanket all night?

About 15 cents for eight hours at 100 W, and about 32 cents at 220 W with both sides of a dual-control blanket running, at the US average rate of $0.1834/kWh. Multiply the kWh figures by your own rate for an exact answer.

Is it expensive to leave an electric blanket on all night?

No. At the highest published wattage in our set it is about 32 cents a night, and most blankets have an auto shut-off that ends the session between eight and twelve hours anyway.

How much electricity does an electric blanket use in 8 hours?

0.8 kWh at 100 W, 1.04 kWh at 130 W, and 1.76 kWh at 220 W. Multiply by your per-kWh rate for the cost.

Does an electric blanket use less electricity on a low setting?

Yes. Rated wattage is the draw at maximum; a lower setting means the element spends more time cycled off. How much less is not something we can quantify for a blanket we have not measured, so we publish the rated figure as an upper bound.

Cost to run / Data

What an electric blanket costs per night

Fifteen cents at 100 watts. Thirty-two at 220. Here is the arithmetic in full, the source of the rate, and the three things that move the number.

By Scooter M.Updated August 31, 2026Scooter M. reads the manuals, compiles the published specs, and shows the arithmetic.

An eight-hour night under a 100 W blanket costs about 15 cents at the US average residential rate of $0.1834/kWh. A 130 W full is about 19 cents. A 220 W dual-control queen with both sides running is about 32 cents. One side alone is about 16 cents.

The arithmetic, in three steps

There is one calculation on this whole site and this is it. Watts to kilowatts, kilowatts times hours to kilowatt-hours, kilowatt-hours times your rate to dollars.

What 100 W costs: a 100 W blanket or throw

Cost of running 100 watts for various durations at $0.1834/kWh
Run time	kWh	Cost	Working
1 hour	0.10	2 cents	100 x 1 / 1000 x 0.1834
4 hours (an evening)	0.40	7 cents	100 x 4 / 1000 x 0.1834
8 hours (a night)	0.80	15 cents	100 x 8 / 1000 x 0.1834
30 nights at 8 hours	24.00	$4.40	100 x 240 / 1000 x 0.1834
A 120-night winter at 8 hours	96.00	$17.61	100 x 960 / 1000 x 0.1834

Rate: US Energy Information Administration, Electric Power Monthly, Table 5.3 (June 2026): 18.34 cents per kWh, average US residential. Retrieved 2026-08-31.

Rated wattage is the ceiling, not the average. A thermostatic blanket cycles its element on and off once the bed is warm, so an all-night bill usually lands below the rated-watt figure. We publish the rated number because it is the only one the maker stands behind, and we do not estimate a duty cycle for a blanket we have not measured.

What 220 W costs: a 220 W dual-control queen, both sides

Cost of running 220 watts for various durations at $0.1834/kWh
Run time	kWh	Cost	Working
1 hour	0.22	4 cents	220 x 1 / 1000 x 0.1834
4 hours (an evening)	0.88	16 cents	220 x 4 / 1000 x 0.1834
8 hours (a night)	1.76	32 cents	220 x 8 / 1000 x 0.1834
30 nights at 8 hours	52.80	$9.68	220 x 240 / 1000 x 0.1834
A 120-night winter at 8 hours	211.20	$38.73	220 x 960 / 1000 x 0.1834

Rate: US Energy Information Administration, Electric Power Monthly, Table 5.3 (June 2026): 18.34 cents per kWh, average US residential. Retrieved 2026-08-31.

Every published model, per night

Cost of an eight-hour night, by published wattage

Cost of an eight-hour night, by published wattage
Model	Rated W	kWh per night	Cost per night
Westinghouse queen	100 W	0.80	15 cents
Bedsure throws (both)	100 W	0.80	15 cents
Bedsure queen, one side	110 W	0.88	16 cents
Bedsure full	130 W	1.04	19 cents
Bedsure mattress pad, both zones	200 W	1.60	29 cents
Bedsure queen or king, both sides	220 W	1.76	32 cents

At $0.1834/kWh (EIA, US residential average, June 2026). Rated watts are an upper bound; a thermostatic blanket cycles off once the bed is warm.

Three things that change your number

1. Your rate, which is not the national average

The single biggest variable, and the one every generic answer ignores. US residential electricity rates vary by more than a factor of two between states. The 18.34 cents we use is a national mean and there is no reason your bill matches it.

Find the per-kWh rate on your own bill and multiply the kWh column above by it. At 12 cents, a 100 W night is under 10 cents. At 30 cents it is 24 cents. Same blanket, same eight hours.

2. How long it is actually on

Eight hours is our default because it approximates a night's sleep, and it flatters nobody. A lot of people run a blanket for thirty minutes to warm the bed and switch it off, which is a sixteenth of the figure above: about a cent.

Preheating and switching off is the cheapest way to use any of these products, and several makers build it in. Bedsure publishes a preheat curve of two hours at level 6 followed by six hours at level 4, precisely so the element is not at full draw all night.

3. The duty cycle we do not estimate

The honest caveat on all of the above. A thermostatic blanket does not draw its rated wattage continuously. Once the bed reaches temperature the element cycles off and back on to hold it, so actual consumption is below the rated arithmetic.

How far below depends on the blanket, the room temperature, the bedding on top and the setting. Measuring it would require a blanket and a meter, and we have neither. So we publish the rated figure, label it as a ceiling, and leave it at that rather than inventing a percentage.

What 15 cents buys, in context

Numbers this small are hard to feel, so three comparisons at the same rate and the same eight hours:

A 100 W electric blanket: 0.8 kWh, about 15 cents.
A 1,500 W space heater: 12 kWh, about $2.20. Fifteen times as much. Worked out in full.
A 10 W LED bulb: 0.08 kWh, about 1.5 cents. So a heated blanket costs roughly what ten light bulbs cost, which is the most intuitive framing we have found for it.

For the monthly and seasonal versions of the same arithmetic, see cost per month. For which models have a published wattage at all, see the watts, by model.

Questions people actually ask

How much does it cost to run an electric blanket all night?: About 15 cents for eight hours at 100 W, and about 32 cents at 220 W with both sides of a dual-control blanket running, at the US average rate of $0.1834/kWh. Multiply the kWh figures by your own rate for an exact answer.
Is it expensive to leave an electric blanket on all night?: No. At the highest published wattage in our set it is about 32 cents a night, and most blankets have an auto shut-off that ends the session between eight and twelve hours anyway.
How much electricity does an electric blanket use in 8 hours?: 0.8 kWh at 100 W, 1.04 kWh at 130 W, and 1.76 kWh at 220 W. Multiply by your per-kWh rate for the cost.
Does an electric blanket use less electricity on a low setting?: Yes. Rated wattage is the draw at maximum; a lower setting means the element spends more time cycled off. How much less is not something we can quantify for a blanket we have not measured, so we publish the rated figure as an upper bound.

Sources

US EIA, Electric Power Monthly, Table 5.3: Average Price of Electricity to Ultimate Customers, June 2026 (18.34 cents/kWh, US residential average)

Every specification on this page traces to a published manufacturer listing or a government data source. Where a maker publishes no wattage, we say so rather than estimating one.