How much does it cost to run an electric heated blanket?
An electric heated blanket is a quilted textile with an embedded resistive heating element that warms through direct electrical current, providing localized warmth without heating an entire bedroom. Because they operate at relatively low wattage and cover only one person or a small area of a bed, their energy consumption is far lower than central heating for the same comfort benefit—making them particularly efficient for supplemental winter warmth.
Electric Heated Blanket running cost calculator
- Per day
- $0.14
- Per month
- $1.70
- Per year
- $20.40
- CO₂ / year
- 48 kg
Based on 120 kWh per year. Adjust the price per kWh to match your latest electricity bill for an exact figure.
At 100 watts used 8 hours a day, an electric heated blanket costs about $0.14 per day, $1.70 per month and $20.40 per year on an average rate of 17¢ per kWh — roughly 120 kWh and 48 kg of CO₂ over a year. Enter your own electricity rate and usage in the calculator above for a figure matched to your bill.
The core reason a heated blanket consumes the watts it does comes down to the resistance wire woven into its fabric. Unlike a space heater that must warm the air in a room, a heated blanket only needs to heat a small mass of material and the person beneath it. Most models operate between 50 and 200 watts depending on size (single versus queen), insulation quality, and heat settings. Smaller blankets and models with lower heat settings draw less power, while larger blankets and those with higher temperature settings draw more. Understanding this relationship helps explain why choosing the right size for your actual needs—rather than oversizing to a queen blanket when you only sleep alone—can reduce energy use without sacrificing comfort.
Real-world usage patterns matter significantly for heated blankets because they are genuinely seasonal appliances. Most people use them during fall and winter months only, typically for a few hours each evening when they're in bed. How you operate the blanket daily affects its consumption far more than its maximum capacity does. Running it on the lowest comfortable heat setting instead of the highest can cut energy use substantially. Many people also make the mistake of turning on a heated blanket hours before bed; since it only needs to warm you and the bed surface, turning it on just before you get in—or using a timer to activate it when you're actually getting into bed—eliminates wasted energy. Similarly, turning it off as soon as you're warm rather than leaving it running all night compounds savings over the course of a season.
When shopping for an efficient model, pay attention to whether the blanket has a high-low-off switch versus a thermostat. Basic switches force you to make a binary choice: full power or nothing. Thermostatic blankets can maintain a set temperature and cycle on and off as needed, which often results in lower average consumption than constantly running at full power. The material quality and insulation also matter—a well-insulated blanket with good heat retention means it needs less power to keep you warm and can maintain warmth longer after you turn it off. Look for blankets with built-in automatic shutoff timers, as these prevent the common scenario where someone falls asleep and the blanket runs through the entire night.
Common mistakes that inflate consumption include using a heated blanket simultaneously with other heating methods without reducing either—running both a space heater and an electric blanket in the same room makes neither particularly efficient. Another frequent error is not cleaning or maintaining the blanket according to manufacturer instructions; dust and lint buildup can reduce heat distribution and force the element to work harder. Finally, leaving a blanket plugged in year-round, even during months when it's not used, means its controller and heating element circuits continue to draw a small amount of standby power. Unplugging heated blankets during the off-season and storing them properly is a small habit that eliminates this waste entirely.
Frequently asked questions
- Is it cheaper to use a heated blanket or turn up the central heating?
- A heated blanket provides warmth only where you need it—under the covers where you sleep—whereas raising your thermostat heats every room in your home. Because the blanket operates at a fraction of the wattage of a furnace and only heats a small area, it is almost always more cost-effective for supplemental nighttime warmth. The exact comparison depends on how many rooms you're heating and how much you raise the thermostat, but using a heated blanket for sleeping is one of the most efficient comfort upgrades you can make during cold months.
- Do heated blankets use more power if the room is very cold?
- Not directly—a heated blanket's power draw is determined by which heat setting you've selected and the blanket's design, not by ambient temperature. However, a very cold room may cause you to select a higher heat setting to feel comfortable, which does increase consumption. Conversely, a moderately cool room (around 60–65°F) combined with a heated blanket often feels comfortable at a lower setting than if you were relying on room heating. Using a heated blanket allows you to lower your thermostat at night without sacrificing comfort, which is where the real savings occur.
- How long can I safely leave a heated blanket running overnight?
- This depends on the specific model and manufacturer guidelines. Many modern heated blankets have automatic shutoff timers set to 1–4 hours to prevent accidental all-night operation and reduce energy waste. If your blanket doesn't have a timer, it's generally safe to run overnight if it's in good condition, but it's more efficient and safer to turn it off once you're warm or before you fall asleep. Consult your product manual for the manufacturer's recommendations; using a blanket contrary to its instructions may void the warranty and increase fire risk.
- Do all heat settings use proportionally more power, or is low heat much less than high?
- Heated blankets with variable controls (low-medium-high settings or dial adjustments) use progressively more power as you increase the setting. The relationship is typically close to proportional, meaning a blanket on low setting might use roughly half the power of the same blanket on high. However, this assumes the heating element is truly variable; some cheaper models use a fixed resistance element and limit power only by duty cycle, in which case low and high settings differ by how frequently the element cycles on and off. Either way, using the lowest comfortable heat setting noticeably reduces energy consumption compared to maximum settings.
- Can I fold or bunch up a heated blanket when I'm not using it, or does that damage it?
- Folding a blanket neatly for storage is fine and necessary to save space. However, repeatedly creasing it in the same spots over time can stress the heating wires and insulation at those fold lines, potentially causing damage or uneven heating. For long-term storage between seasons, fold the blanket loosely, store it in a cool dry place, and avoid placing heavy items on top of it. Never crumple, crush, or aggressively ball up a heated blanket, as this can kink the internal heating element and reduce its lifespan.
- Is there a significant difference in power consumption between single and queen-sized heated blankets?
- Yes—a queen-sized blanket typically has a larger heating element and greater surface area, so it draws more power than a single-sized blanket. A single blanket might draw around 60–100 watts on high, while a queen might draw 150–200 watts. If you sleep alone, choosing a single or twin-sized blanket instead of a queen can reduce your consumption by 30–50 percent. The trade-off is comfort and coverage, so the right choice depends on whether you share the bed or prefer extra warmth across a larger area.