Does a Heated Mattress Pad Use a Lot of Electricity?

No, a heated mattress pad does not use a lot of electricity. Most draw between 50 and 200 watts at their highest setting, and on low through the night a typical queen pad uses something like 0.2 to 0.5 kilowatt-hours, which is a few cents on most power bills.

So if you’re the one who’s always cold at night, or you’re trying to hold off on turning the heat up, a heated pad is one of the cheapest fixes you can buy. The math is below, so you can check it against your own pad and your own bill. Updated October 27, 2026, for this year’s heating season.

How many watts does a heated mattress pad use?

Most heated mattress pads use between about 50 and 200 watts on their highest setting, and bigger beds sit at the top of that range. A twin is usually at the low end, and a dual-control king with both sides on high is at the top. The exact number is printed on the tag sewn into the pad or on the controller, so trust that tag over any article, this one included.

That number is the maximum draw, not what the pad pulls all night. The controller switches the heating wires on and off to hold the setting you picked, so on low the wires are off a lot of the time. Over a night on low, the average draw can be a small fraction of the number on the tag.

For scale, a 100-watt pad on full heat draws about what one old incandescent light bulb did. A hair dryer or a space heater on high draws around 15 times that.

How much does it cost to run a heated mattress pad all night?

Running a heated mattress pad all night costs a few cents on low and roughly 20 cents on high for all 8 hours, at a typical U.S. electricity rate. The examples below use 17 cents per kilowatt-hour as a round number. Your bill shows your real rate, and it can be a lot higher or lower depending on where you live.

The formula is simple: watts times hours, divided by 1,000, gives kilowatt-hours. Multiply that by your rate and you have your cost. A pad rated at 180 watts and left on high for 8 hours uses 1.44 kWh.

The low-setting averages in the table are estimates, because how often the controller cycles depends on the brand and on how cold your bedroom is. If you want your exact number, a plug-in energy monitor will measure your pad over a real night. For most people the worst-case math alone settles the question.

Is a heated mattress pad cheaper than a space heater?

Yes, by a lot. A typical space heater draws 1,500 watts on high, so 8 hours uses about 12 kWh, or roughly two dollars a night at the example rate. That’s about what a heated pad on low uses in a whole month.

The difference is what gets heated. A space heater warms all the air in the room, and that heat keeps leaking out through windows and walls. A heated pad warms you and your bed, which is the only part of the room that matters at 3 a.m.

A space heater still makes sense when you need the room itself warm, like getting dressed on a cold morning. If that’s you, our guide to sizing a space heater for a bedroom shows how many watts a room really needs.

Does a heated mattress pad use more power than an electric blanket?

No, they use about the same. Electric blankets and heated mattress pads for the same bed size have similar wattage ratings, so their power use is close. The real difference is where the heat goes.

A pad sits under you, and your sheets and regular covers trap its heat against your body. An electric blanket on top loses some heat to the room unless you put another layer over it. Plenty of people find they can run a pad one setting lower for the same comfort, which brings its real use down a little.

Heavy layers on top hold heat in well, though a weighted blanket is a chore to clean. Our post on whether a weighted blanket can go in the dryer covers that part.

Can a heated mattress pad lower your heating bill?

It can, but only if it lets you turn the thermostat down at night. The U.S. Department of Energy says setting your thermostat back 7 to 10 degrees Fahrenheit for 8 hours a day can save as much as 10 percent a year on heating. A warm bed is what makes a cooler bedroom easy to live with.

If you run the pad and keep the house at the same temperature, it’s a small added cost, not a savings. It’s a cheap one. The money only comes back when the furnace runs less.

Late October is also when the furnace comes on for the first time in months. If that first run brings a funky smell with it, here’s why the house smells musty when the heat comes on and what to do about it.

How do you use less power with a heated mattress pad?

Preheat, then turn it down or off. Most of the comfort comes from climbing into a bed that’s already warm, so run the pad on high for 20 to 30 minutes before bed and switch to low, or off, when you get in. That one habit cuts its use more than anything else.

• Use the auto-off timer. Many pads shut off on their own after several hours, often around 10, and a shorter timer saves more if your controller has one.
• Turn off the empty side. On a dual-control pad, a side nobody is sleeping on uses the same power as one somebody is.
• Keep the pad flat and directly under the fitted sheet. Bunched-up pads make hot spots, and manufacturers warn against it for safety reasons too.
• Keep a regular comforter on top so the heat stays in the bed.

If your feet are cold but your head runs hot, a pad on low and a cooler pillow is a fair middle ground. Our notes on cooling pillows for side sleepers go through what makes a pillow sleep cooler.

Frequently asked questions

If you’re cold at night and worried a heated mattress pad will show up on your bill, it mostly won’t. Preheat it, run it on low, and get your money back by turning the thermostat down a few degrees.

Bedding tends to go on sale this time of year, and you can see what we’re tracking on the Berry Finds deals page. Before you buy any heated pad, look up its wattage on the product label, because that number tells you more than anything on the box.