How much does it cost to run an electric blanket?
Electric blankets are woven heating elements sandwiched between fabric layers that warm your body directly rather than heating the air around you, making them one of the most efficient ways to stay warm at night. Because they operate at low wattage and deliver heat precisely where you need it, they consume far less energy than space heaters or central heating over the same period. Most electric blankets draw around 100 watts—roughly equivalent to a bright incandescent light bulb—yet provide significantly more comfort per watt than whole-room heating solutions.
Electric Blanket running cost calculator
- Per day
- $0.14
- Per month
- $1.36
- Per year
- $16.32
- CO₂ / year
- 38.4 kg
Based on 96 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 blanket costs about $0.14 per day, $1.36 per month and $16.32 per year on an average rate of 17¢ per kWh — roughly 96 kWh and 38.4 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 fundamental efficiency of electric blankets comes down to physics and human biology. Your body generates substantial heat on its own, and an electric blanket supplements rather than replaces that heat. Unlike a space heater that must warm an entire room's volume of air, an electric blanket works within an insulated microclimate—trapped between your body and the blanket itself. This means minimal heat escapes to the surroundings, and almost all the electrical energy converts directly into warmth you actually use. The result is one of the best ratios of energy input to human comfort in home heating.
When shopping for an electric blanket, pay attention to wattage and heat settings. Lower-wattage models (75–100W) are standard for single blankets and cost less to run, while dual-zone blankets for couples often reach 150–200W but allow each person to set their preferred temperature independently. Many modern blankets include multiple heat settings—typically low, medium, and high—and thermostatic controls that cycle power on and off to maintain a stable temperature rather than running continuously. A blanket that cycles intelligently will use less total energy than one locked at maximum heat all night. Look for models with automatic shut-off timers; setting the blanket to warm you up for the first 30 minutes of sleep, then switch off, can halve nightly consumption without sacrificing comfort.
Common mistakes undermine the cost benefits of electric blankets. Using one on top of poor insulation—such as on a cold mattress without adequate bedding underneath—forces the blanket to work harder and wastes energy heating the air above it rather than focusing on your body. For best efficiency, place the blanket over you, not under you, and ensure your mattress and base layers trap body heat effectively. Leaving a blanket running during the day or in an unoccupied bed is pure waste. Another frequent error is assuming a higher heat setting always means more comfort; many people find medium heat perfectly adequate once the blanket has been on for a few minutes, especially in a well-sealed bedroom. Testing different settings during your first few nights will reveal the optimal balance for your needs.
Maintenance also affects ongoing running costs. Blankets accumulate dust and lint over time, which insulates the heating elements and forces them to work harder to reach the same temperature. Regular gentle vacuuming (never wash unless the manufacturer explicitly permits it) keeps the blanket clean and responsive. Frayed wiring or damaged fabric increases resistance in the circuit, which can cause unexpected power spikes. Inspect your blanket annually for wear, and retire any model that shows signs of damage—both for safety and to avoid running an inefficient unit. Finally, consider how often you actually use the blanket across seasons. A blanket used heavily from November through February in a cold climate will pay back its purchase cost far faster than one used sporadically during mild weather, making it sensible to invest in a quality model if heating through winter nights is your pattern.
Frequently asked questions
- Why are electric blankets so much cheaper to run than space heaters?
- Space heaters must warm the entire air volume of a room, and heat constantly escapes through walls, windows, and ventilation. Electric blankets heat only your body within an insulated microclimate, so nearly all energy goes into warmth you directly use rather than lost to the surroundings. A space heater typically draws 750–1500W continuously, while a blanket draws 75–150W and only heats the area you occupy.
- Should I use my electric blanket on low or high heat to save money?
- Use the lowest heat setting that keeps you comfortable. Most people find low or medium adequate after the blanket has warmed up for 5–10 minutes. High heat uses more power and is rarely necessary for sleeping. Many blankets also cycle intelligently on medium or low, switching power on and off as needed to maintain temperature, which is more efficient than running continuously at high.
- Is it safe to leave an electric blanket on all night?
- Modern electric blankets with automatic shut-off timers and thermostatic controls are designed for extended use and are generally safe overnight. However, older blankets without these features can pose a fire or burn risk if left unattended for long periods. Always check your blanket's manual and follow the manufacturer's recommendations. Setting a timer to turn off the blanket after you fall asleep is both safe and energy-efficient.
- Do dual-zone blankets for couples use more electricity than single blankets?
- Dual-zone blankets typically draw 150–200W total because they contain two separate heating circuits and thermostats. This is still significantly less than running two single blankets (which would total 150–200W combined anyway) and offers the advantage of independent temperature control—one person can use medium heat while the other uses low, avoiding overheating one person to warm the other.
- What size or type of electric blanket uses the least energy?
- Smaller blankets (lap blankets or twin-size) draw less power than queen or king sizes because they contain fewer heating elements. However, a full-size blanket may be more efficient per degree of comfort if a larger surface area means you don't need to run it as hot. Choose a blanket that matches your bed size and sleeping style—oversized blankets waste energy warming areas you don't use.
- Can I improve my blanket's efficiency by using it with other bedding?
- Yes. Layering your electric blanket over insulating base sheets or a duvet traps body heat and prevents it from escaping upward, allowing the blanket to reach comfort at a lower power setting. A mattress with a thermal barrier underneath (rather than directly on a cold bed frame) also helps. Conversely, using a blanket on top of cold, non-insulating sheets forces it to work harder. Proper layering can noticeably reduce the temperature setting needed.