Are electric blankets expensive to run?
Electric blankets usually cost less to run than heating an entire room. Most use between 40W and 150W, so they can cost just a few pence an hour. The exact cost depends on the blanket's wattage, how long you use it, and your electricity rate.
Many people use electric blankets in colder months to stay warm without turning up the central heating. Running costs vary, so calculate them using your own electricity rate.
Do electric blankets use a lot of electricity?
No, electric blankets usually don’t use much electricity. Most models use between 40W and 150W—far less electricity than many household appliances, such as electric heaters or tumble dryers.
How much electricity an electric blanket uses depends on its wattage, heat setting, how long you leave it on, and the type of blanket.
Because electric blankets heat only the area around your body, not the whole room, they may use less energy than some other ways to heat your home.
How much does an electric blanket cost to run?
The cost of running an electric blanket depends on its wattage, how long it's used and the electricity unit rate you're paying.
Example calculation
The example below assumes:
- Electricity unit rate: 26.32p per kWh(1)
- One hour of use
- A typical 70W electric blanket
Formula
Running cost = kWh used × electricity unit rate
For example:
A 70W electric blanket uses 0.07 kWh of electricity in one hour.
If electricity costs 26.32p per kWh:
0.07 × 26.32p = 1.84p
Running cost = approximately 1.84p per hour
Note: Watts (W) measure power, while kilowatt-hours (kWh) measure the amount of electricity used over time. A 70W electric blanket uses 0.07 kWh of electricity when operated for one hour.
In other words, using a 70W electric blanket for one hour would cost approximately 1.84p at an electricity unit rate of 26.32p per kWh.
The figures below are illustrative examples based on the same electricity unit rate. Actual running costs will vary depending on your electricity tariff, the blanket's wattage, and how long you use it.
| Electric blanket wattage | Electricity used in 1 hour (kWh) | Cost per hour |
|---|---|---|
| 40W | 0.04 kWh | 1.05p |
| 60W | 0.06 kWh | 1.58p |
| 70W | 0.07 kWh | 1.84p |
| 100W | 0.10 kWh | 2.63p |
| 150W | 0.15 kWh | 3.95p |
Example overnight costs (8 hours)
| Electric blanket wattage | Electricity used over 8 hours (kWh) | Cost for 8 hours |
|---|---|---|
| 40W | 0.32 kWh | 8.42p |
| 60W | 0.48 kWh | 12.63p |
| 70W | 0.56 kWh | 14.74p |
| 100W | 0.80 kWh | 21.06p |
| 150W | 1.20 kWh | 31.58p |
What affects the running cost of an electric blanket?
Electric blanket wattage
An electric blanket’s wattage affects how much electricity it uses. Most models use about 40 to 150 watts, though some use more or less. For the same amount of time, a higher-wattage blanket usually uses more electricity than a lower-wattage one.
How long you use it
The longer you leave an electric blanket on, the more electricity it uses.
Many modern electric blankets include timers and automatic shut-off settings, which can help reduce unnecessary energy use.
Your electricity unit rate
Your electricity tariff plays an important role in running costs.
Two households using the same electric blanket for the same length of time may pay different amounts depending on their electricity unit rates and tariff type.
Are electric blankets expensive to buy?
Prices range from around £30 to £150 depending on size and finish quality.
Are electric blankets energy efficient?
Electric blankets can be an energy-efficient way to keep warm because they heat the person rather than the whole room. However, efficiency depends on factors such as the blanket's wattage, how long it's used and the alternative heating option you're comparing it against.
For example, using an electric blanket to stay warm while relaxing in one room may use less energy than increasing the temperature throughout your entire home.
If you're considering longer-term heating improvements, there are other energy-efficient heating alternatives.
What are the different types of electric blankets?
Several types of electric blankets are available, each designed for different uses.
Electric underblankets
Electric underblankets fit under your bedsheet and warm the bed before or during sleep.
Electric throws
Electric throws are designed to sit over you while you're resting on a sofa, chair or bed. They're often portable and useful for targeted warmth.
Heated blankets and pads
Heated blankets, mattress pads and heated pads can provide warmth to specific areas of the body or sleeping surface.
The power consumption, features and running costs can vary between products.
| Type of warmer | Usual energy consumption |
|---|---|
| Electric blanket | Between 40-150 watts |
| Electric throw | Between 40-150 watts |
| Electric underblanket | Between 40-150 watts |
| Heated shawl/shoulder warmer | Around 120 watts |
| Electric heated pad | Around 100 watts |
Can you use an electric blanket on a mattress?
Most electric underblankets are designed for use on a mattress beneath a fitted sheet. However, always follow the manufacturer's instructions, as suitability can vary by blanket and mattress type.
How do electric blankets work?
Electric blankets have thin, insulated wires or heating elements woven into the fabric. When you plug in and switch on the blanket, electricity flows through the wires and creates gentle heat.
Most modern electric blankets let you adjust the heat to a comfortable level. Some also have timers or an automatic shut-off, so they don’t stay on longer than needed.
How to use an electric blanket
While instructions vary by manufacturer, most electric blankets are used in a similar way:
- Check the manufacturer's instructions
- Lay the blanket in the correct position
- Connect the controller securely
- Select the desired heat setting
- Use timers or auto shut-off features where available
- Switch the blanket off when no longer needed
Always follow the instructions provided with your specific product.
Can you wash an electric blanket?
Many modern electric blankets can be washed, but washing instructions vary by manufacturer.
Before washing:
- Unplug the blanket
- Remove detachable controllers if applicable
- Check the care label
- Follow manufacturer washing instructions
- Dry the blanket fully before reuse
Always follow the guidance supplied with your specific product.
Are electric blankets safe?
Modern electric blankets are generally designed with safety features such as thermostatic controls, timers and automatic shut-off systems. However, safe use depends on following the manufacturer's instructions and regularly checking the blanket for signs of wear or damage.
For the most up-to-date safety advice, refer to official guidance from organisations such as Electrical Safety First and your manufacturer's instructions.
Tips for using an electric blanket safely:
- Always read and follow the instructions and manufacturer safety advice
- It’s always best to buy a new one, as you can’t be sure how old a second-hand one is or how safely its previous owner used it.
- It's recommended you buy a new one every ten years and test them every two years
- Contact your local fire station and ask if they can check your blanket - some offer this service free of charge
- Check it has the British or European standard and a safety certification mark
- Check the blanket has overheating protection
- Check for damage or wear before using it
- Only leave an electric blanket switched on overnight if it has thermostatic controls and the instructions say it's safe to do so
- If your blanket doesn't come with thermostatic controls, make sure to switch it off before falling asleep
- Never get an electric blanket wet. Hot water bottles should never be used with an electric blanket in case it leaks
- Take care when letting pets lie on beds with electric blankets or extra blankets. They can overheat or damage the blanket, which could make it unsafe. To keep your pet cosy in winter, try a blanket made especially for animals
- Never use an electric blanket with an adult or infant who may struggle to switch it off
- Never use an electric blanket with a person who is insensitive to heat
Note: Review all replacement guidance and lifecycle claims against current Electrical Safety First recommendations before publishing.
Is it cheaper to use an electric blanket or heating?
In some situations, using an electric blanket may cost less than heating an entire room because it only warms the person using it.
However, the answer depends on:
- Your electricity tariff
- Your heating system
- The size of the space being heated
- How long heating is required
An electric blanket may reduce heating use in some situations, but it shouldn't replace home heating. Maintaining an appropriate indoor temperature can help reduce issues such as damp and mould.
Electric blankets: pros and cons
Pros
- Heats just you
- Can save energy and your carbon footprint
- Can relieve muscle and joint pain
- Can help with a better night's sleep
Cons
- Potential fire risk if not used as recommended by the manufacturer
- Can be dangerous for animals
- Not ideal for memory foam mattresses
Other ways to reduce your energy costs
An electric blanket uses relatively little electricity, but it may not be the only factor affecting your energy bills. Combine it with other ways to save:
Check your energy tariff
Compare tariffs to see whether a fixed energy tariff, standard variable tariff, time-of-use tariffs or off-peak plan suits your household. If your circumstances or energy use have changed, find out how to switch energy supplier.
Track and reduce energy use
A smart meter can help you monitor when and how much electricity you use, making it easier to spot waste. Explore ways to cut bills, such as reducing standby power and choosing efficient appliances and lighting.
Heat your home efficiently
Heating is a major household cost. Turn down the thermostat if comfortable, keep radiators clear, improve insulation, block draughts and prepare your home for winter. Read our guide on energy-saving tips.
For longer-term savings, consider efficient heating options such as heat pumps, which may suit some homes as an alternative to fossil-fuel systems. Learn more about energy-efficient alternatives to gas boilers.
Bottom line
Frequently asked questions
How should you store an electric blanket?
Roll it carefully rather than folding it. This helps protect the wires from damage and can extend your electric blanket's life.
Can you use an electric blanket during a power cut?
No. Electric blankets need mains electricity to operate, so they won't provide heat during a power outage unless connected to an approved backup power source.
Is it safe to leave an electric blanket on all night?
Some modern electric blankets are designed for overnight use and include safety features such as thermostatic controls and auto shut-off functions. Always check the manufacturer's instructions before leaving a blanket switched on while sleeping.
Do electric blankets use a lot of electricity?
No. Most electric blankets use between 40W and 150W, which is relatively low compared with many household appliances.
What wattage is typical for an electric blanket?
Most electric blankets use 40W to 150W, though power ratings vary by model.
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