Electric blankets use very little electricity. Most models draw between 50 and 150 watts, which translates to roughly $0.01 to $0.03 per hour at average U.S. electricity rates. Even running one every night through winter, you’re looking at a few dollars a month on your electric bill.
How Many Watts Electric Blankets Actually Use
The wattage depends mostly on the blanket’s size and heat setting. A twin-size blanket designed for a single bed typically draws 50 to 70 watts. A full or queen blanket runs between 80 and 100 watts, while a king-size blanket with dual controllers sits in the 100 to 150 watt range. Smaller throw blankets meant for couch use pull 50 to 100 watts.
Those numbers represent the maximum draw at the highest heat setting. In practice, the blanket cycles on and off to maintain your chosen temperature, so real-world consumption over a full night is noticeably lower than the peak wattage suggests. If you set a queen blanket to medium and sleep eight hours, it won’t pull 100 watts continuously. It heats up, the thermostat kicks in, and the blanket coasts for stretches without drawing power.
What It Costs to Run Per Night and Per Month
The national average electricity rate in the U.S. is about 13.6 cents per kilowatt-hour. At that rate, running a 100-watt queen blanket at full power for eight straight hours would cost roughly 11 cents. That’s the ceiling, not the norm. With a medium setting and the thermostat cycling, a typical night costs somewhere between 4 and 8 cents.
Over a full month of nightly use, that works out to about $1.20 to $3.50 for most blankets. Even a large king-size model on a higher setting will rarely cost more than $5 to $6 a month. For context, that’s less than leaving a single 60-watt light bulb on overnight for the same period.
Electric Blankets vs. Space Heaters
This is where the efficiency gap becomes dramatic. A standard portable space heater draws about 1,500 watts, which costs roughly $2.55 per hour to operate. An electric blanket running at the same time costs $0.01 to $0.03 per hour. That’s up to 98% less energy for the same basic goal: keeping you warm while you sleep or sit on the couch.
The reason for such a massive difference is simple. A space heater warms an entire room full of air, most of which isn’t touching your body. An electric blanket heats only the thin layer of air trapped between you and the fabric. It’s heating a person, not a room, and that requires a fraction of the energy.
If you’ve been running a space heater in your bedroom at night, switching to an electric blanket could save you $70 or more per month during the cold season. Even compared to cranking your central heating a few degrees higher, an electric blanket is a bargain. Every degree you lower your thermostat reduces your heating bill, and an electric blanket can make a cooler bedroom perfectly comfortable.
Tips to Use Even Less Energy
Pre-heat your bed for 15 to 30 minutes before you get in, then turn the blanket down to a low setting or off entirely. Your body heat, trapped under the covers, does most of the work once the bed is warm. That short pre-heat uses a trivial amount of electricity, and you avoid running the blanket at a higher setting all night.
Most modern electric blankets come with auto-shutoff timers, typically ranging from 2 to 10 hours. Setting a shorter timer means the blanket turns itself off after you’ve fallen asleep and your body heat has taken over. This prevents unnecessary hours of power draw and adds a layer of safety.
Low-voltage blankets use a transformer to step down the power from your wall outlet before it reaches the heating wires. These models take a bit longer to warm up, but they use less energy overall and are generally considered safer. If you’re buying new, a low-voltage model with a timer and multiple heat zones gives you the most control over both comfort and energy use.
How It Compares to Other Household Appliances
To put electric blanket usage in perspective, here’s how it stacks up against common items in your home:
- Electric blanket (queen, medium setting): ~60 watts average
- Laptop computer: 30 to 65 watts
- LED TV (50-inch): 70 to 100 watts
- Portable space heater: 1,500 watts
- Hair dryer: 1,000 to 1,800 watts
An electric blanket running all night uses roughly the same energy as watching a few hours of television. It’s one of the lowest-draw appliances you can plug in, and among the cheapest ways to stay warm during winter months.