Electric blankets use far less power than most household appliances, even when running all night

An electric blanket typically draws between 60 and 100 watts while it is on — roughly the same as a single incandescent light bulb. A space heater, by contrast, uses 750 to 1500 watts. A hair dryer uses 1200 to 1800 watts. If you run an electric blanket for eight hours every night, it will add somewhere between $10 and $20 to your annual electricity bill, depending on your local rates and how often you use the highest heat setting.

The reason electric blankets are so efficient is that they warm you directly instead of heating the air in a room. You need far less energy to warm a small area of fabric draped over your body than to raise the temperature of an entire bedroom. Most electric blankets also have a thermostat built in — once they reach your chosen temperature, they cycle on and off rather than running constantly, which cuts power use even further.

Key Takeaways

  • Electric blankets draw 60 to 100 watts, making them one of the lowest-power appliances in your home.
  • Running an electric blanket eight hours nightly costs roughly $10 to $20 per year in electricity.
  • Electric blankets are more efficient than space heaters or central heating because they warm only the person using them, not an entire room.
  • Newer blankets with automatic shutoff timers use even less power than older models without temperature controls.
  • The actual cost depends on your local electricity rate, which varies by region and utility company.

Why electric blankets use so little power compared to other heaters

The fundamental difference between an electric blanket and a space heater comes down to what you are trying to warm. A space heater must raise the temperature of all the air in a room — a job that requires constant, high-power output. An electric blanket only needs to warm the fabric and the small pocket of air between the blanket and your body. That is a vastly smaller volume and requires far less energy.

Think of it this way: heating 200 cubic feet of bedroom air from 65 degrees to 72 degrees takes significant power. Heating a 5-pound blanket and the air when ready around your torso takes almost none. This is why electric blankets became popular in cold climates and in homes where people wanted to lower their thermostat at night — you can keep the room cool and stay warm under the blanket, which saves money overall.

How to calculate what your electric blanket costs to run

To find the actual cost for your situation, you need two pieces of information: the wattage of your blanket and your local electricity rate. The wattage is usually printed on a tag attached to the blanket or listed in the manual. If you cannot find it, assume 75 watts as a reasonable middle estimate.

Your electricity rate appears on your monthly utility bill, usually listed as cents per kilowatt-hour (kWh). A typical rate in the United States ranges from 10 to 20 cents per kWh, but this varies significantly by region and utility company. Once you have both numbers, the math is straightforward: multiply the wattage by the number of hours you use it per day, divide by 1000 to convert to kilowatts, then multiply by your rate and the number of days per year.

For example, a 75-watt blanket used eight hours per night at 15 cents per kWh costs: (75 × 8 ÷ 1000) × 0.15 × 365 = about $33 per year. A 100-watt blanket at the same rate costs about $44 per year. These are rough estimates — your actual cost will shift based on how often you use the highest setting and whether your blanket has an automatic timer.

Older blankets versus newer models with temperature controls

Blankets made before the 1990s often lacked built-in thermostats and ran at full power whenever they were switched on. Newer electric blankets almost always include a thermostat that cycles the heating element on and off to maintain your chosen temperature. Once the blanket reaches the set warmth, the heating element shuts down until the temperature drops slightly, then turns back on. This cycling dramatically reduces average power use compared to continuous operation.

Some newer models also include automatic shutoff timers — the blanket runs for a set period (usually 30 minutes to a few hours) and then turns off completely. This feature is both a safety measure and an energy saver. If you fall asleep and forget to turn off the blanket, the timer does it for you, and you use less electricity overall because the blanket is not running all night.

Electric blankets versus other ways to stay warm at night

If you are deciding between an electric blanket and other heating methods, the power consumption tells a clear story. An electric blanket uses 60 to 100 watts. A space heater uses 750 to 1500 watts — roughly 10 times more. Running a central heating system to warm your entire home uses even more. If your goal is to stay warm without driving up your electric bill, an electric blanket is one of the most efficient options available.

The trade-off is coverage: an electric blanket warms only the person under it, so it does not help if you want to heat a shared room or a space where multiple people gather. A space heater or central heating warms the entire area. For a single person or a couple sharing a bed, though, an electric blanket is hard to beat on efficiency.

Safety considerations and power use

The low power draw of electric blankets also makes them safer than high-power appliances in certain ways. Because they use so little electricity, they generate less heat in the wiring and connections, which reduces the risk of electrical fire compared to a space heater. That said, electric blankets still require basic care: check the cord for damage before use, do not fold or bunch the blanket while it is plugged in, and do not use it with a waterbed or on top of another heating pad.

Older blankets (more than 10 or 15 years old) are more likely to have worn insulation or damaged wiring, which increases risk. If you have an old blanket, inspect it carefully or consider replacing it with a newer model. The modest cost of a new blanket is worth the safety improvement and the added efficiency from modern thermostats.

Frequently Asked Questions

Will an electric blanket noticeably increase my electric bill?

No. An electric blanket adds roughly $10 to $40 per year to your bill, depending on how often you use it and your local electricity rate. That is less than the cost of most other appliances you use daily. If you lower your home thermostat by a few degrees while using the blanket, you may actually save money overall.

Does it cost more to run an electric blanket all night than to use it for a few hours?

Yes, but the difference is modest. An eight-hour night costs roughly twice as much as a four-hour night, but the total is still only $10 to $20 per year for eight hours. If your blanket has an automatic timer, it will shut off after a set period and use even less power.

Are weighted blankets more efficient than electric blankets?

Weighted blankets use no electricity at all — they work by distributing pressure across your body, which some people find calming. They do not generate heat, so they are not a replacement for an electric blanket in a cold room. Both can be useful depending on what you need.

Can I use an electric blanket with a smart power strip to save more money?

Yes. A smart power strip can turn the blanket off automatically at a set time or when you leave the room. Since electric blankets already use very little power, the savings will be small — perhaps a few dollars per year — but the convenience and safety benefit of automatic shutoff may be worth it.

Do heated mattress pads use more or less electricity than electric blankets?

Heated mattress pads typically use 60 to 150 watts, similar to electric blankets. The cost to run them is roughly the same. Some people prefer mattress pads because they warm from underneath, while others prefer blankets because they are easier to adjust or remove during the night.