Electric blankets use far less power than most people think

An electric blanket typically draws between 60 and 100 watts while it is running — roughly the same as a standard light bulb. A full-size blanket on high heat uses around 100 watts. A twin-size blanket on low uses around 60 watts. To put this in perspective, your refrigerator runs 24 hours a day and uses 150 to 800 watts depending on the model. Your electric blanket runs for a few hours before bed and then shuts off.

The actual cost depends on your local electricity rate and how long you use the blanket each night. If you pay 15 cents per kilowatt-hour (a common U.S. rate, though yours may be higher or lower), running a 100-watt blanket for 8 hours costs about 12 cents per night, or roughly $3.60 per month. Running it for 4 hours costs about half that. Most households see no meaningful change in their electric bill from adding an electric blanket.

Key Takeaways

  • Electric blankets draw 60 to 100 watts on high heat, which is less power than a typical refrigerator or space heater.
  • An 8-hour night of use costs roughly 10 to 15 cents depending on your local electricity rate and blanket size.
  • The blanket's thermostat automatically cycles the heating on and off, so it does not run at full power all night.
  • Older blankets without automatic shutoff use slightly more power than newer models with built-in timers and temperature controls.
  • A heated mattress pad uses similar wattage to an electric blanket but distributes heat more evenly across the bed.

How electric blanket power compares to other household devices

The confusion usually comes from comparing blankets to the wrong things. A space heater uses 750 to 1500 watts — 10 to 15 times more than an electric blanket. A hair dryer uses 1000 to 2000 watts. A microwave uses 600 to 1200 watts. An electric blanket is one of the lowest-power heating devices in your home.

The reason is simple: an electric blanket only needs to warm you and the small area around your body, not an entire room. A space heater has to heat the air in a 200-square-foot bedroom. An electric blanket has to warm maybe 20 square feet of fabric. That is a massive difference in the work required.

Why the blanket does not run at full power all night

Electric blankets have a built-in thermostat that turns the heating element on and off automatically. You set your desired temperature, and the blanket maintains it by cycling the heat. Once the blanket reaches your target warmth, the heating element shuts down. It only turns back on if the temperature drops below your setting.

This cycling means the blanket is not actually drawing 100 watts for 8 straight hours. It might draw full power for 15 minutes to warm up, then cycle on and off for the rest of the night, averaging perhaps 30 to 50 watts over the full period. Blankets with manual controls (low, medium, high) do not have this automatic cycling, so they draw steady power at whatever level you set — but even then, the wattage is still low compared to other appliances.

Older blankets versus newer models with timers

Blankets made before 2010 often lack automatic shutoff and temperature control. They run at constant power as long as they are plugged in and switched on. If you fall asleep and forget to turn it off, it keeps heating all night. This wastes some electricity, though the total is still modest — perhaps an extra dollar or two per month if you regularly leave it on.

Modern electric blankets often include automatic shutoff timers (usually 1 to 10 hours) and improved thermostats. Some models connect to your phone and let you turn them on remotely before bed. These features do not significantly reduce power draw during use, but they prevent waste from blankets left running after you fall asleep. If you own an older blanket, you can achieve the same effect by using a plug-in timer, which costs $10 to $20.

Heated mattress pads and their power use

A heated mattress pad works similarly to an electric blanket but covers the entire mattress surface instead of just the top. They typically use 60 to 150 watts depending on size and heat setting. A queen-size pad on high uses roughly the same power as a full-size electric blanket on high. The advantage is more even heat distribution across the bed, which some people find more comfortable.

The cost to run a heated mattress pad is comparable to an electric blanket — roughly 10 to 20 cents per night for an 8-hour run. Like blankets, mattress pads cycle their heating on and off, so actual power draw is lower than the peak wattage rating. Both are among the cheapest ways to add warmth to your bed without raising your overall heating bill.

When an electric blanket actually saves you money

If you use an electric blanket instead of raising your home's thermostat, you will almost certainly save money. Heating an entire house to 72 degrees uses far more electricity than warming just your bed to comfort. A whole-home heating system might use 3000 to 5000 watts or more depending on your climate and insulation. Running your blanket at 100 watts while lowering the thermostat by just 2 or 3 degrees can cut your heating bill by 10 to 15 percent during winter months.

The math works out especially well in mild climates where you only need supplemental warmth at night, or in homes with poor insulation where heating the whole space is expensive. In very cold climates where you need the thermostat high regardless, the blanket is still cheap to run but will not offset your main heating costs.

Safety and efficiency tips for electric blankets

To get the most from your blanket without wasting power, keep the thermostat set to a comfortable level rather than cranking it to maximum. High settings do not heat faster — they just maintain a higher temperature, which wastes energy once you are warm. Most people find low to medium settings perfectly comfortable for sleeping.

Do not use your electric blanket under a heavy comforter or duvet. This traps heat and can cause the blanket to overheat or shut off its thermostat prematurely, making it cycle more often than necessary. Use the blanket as your top layer or under a light sheet. Also, check the cord and heating element for damage before each season. A frayed wire or cracked element can short out and stop working, wasting electricity without providing heat.

Frequently Asked Questions

Do electric blankets use more electricity than leaving a space heater on?

No. A space heater uses 750 to 1500 watts, while an electric blanket uses 60 to 100 watts. A space heater costs roughly 10 to 15 times more to run per hour. If you are choosing between the two for warmth, the electric blanket is far cheaper.

Will an electric blanket noticeably increase my electric bill?

Probably not. Running a blanket 8 hours per night for a full month costs roughly $3 to $5 depending on your local electricity rate. Most households will not see this on their bill. You would notice a change only if you ran multiple blankets simultaneously or left one on 24 hours a day.

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

Modern blankets with automatic thermostats are designed to run all night safely. Older blankets without thermostats can overheat if left on continuously. Check your blanket's manual. If it lacks automatic shutoff, use a plug-in timer set for 2 to 4 hours, or simply turn it off before sleep.

Do heated mattress pads use more power than electric blankets?

They use roughly the same amount. A queen mattress pad uses 60 to 150 watts depending on size and setting, similar to a full-size blanket. The main difference is comfort and heat distribution, not power consumption.

Can I reduce my electric blanket's power use by running it on low instead of high?

Yes, but only slightly. Low settings draw less power than high settings, but the difference is typically 20 to 30 watts. Since the blanket cycles on and off to maintain temperature, the real savings come from setting it to a comfortable level rather than maximum heat, which wastes energy maintaining unnecessary warmth.