Heating
Electric Blanket Cost Calculator UK
Estimate the cost of pre-warming a bed or using a low-wattage electric blanket.
Estimated running cost
- Per hour
- 2.47p
- Per day
- 4.93p
- Per week
- 34.54p
- Per month
- £1.48
- Per year
- £18.01
Formula: blanket wattage ÷ 1,000 × hours used × electricity price.
Cost table
| Scenario | Power | Use time | Cost at 24.67p/kWh |
|---|---|---|---|
| 60W for 2 hours | 60W | 2 hours | 2.96p |
| 100W for 2 hours | 100W | 2 hours | 4.93p |
| 150W for 4 hours | 150W | 4 hours | 14.80p |
Formula
blanket wattage ÷ 1,000 × hours used × electricity price = running cost
For example, a 100W electric blanket used for 2 hours at 24.67p/kWh costs 0.1 x 2 x 24.67p = 4.93p.
Ways to reduce the cost
- Use timer settings rather than running all night unless designed for it.
- Pre-warm the bed, then turn it down or off.
- Check safety guidance for age, condition and washing.
- Compare with heating a whole room for short periods.
FAQs
Is an electric blanket cheap to run?
Yes compared with room heaters, because wattage is usually low.
Can it replace heating?
It can improve comfort in bed, but it does not heat the room or address damp.
Is it safe to use overnight?
Only if the product is designed for overnight use and in good condition.
How much per month?
A 100W blanket for 2 hours nightly costs about £1.48 per 30 days.
Last reviewed 3 May 2026. Source: Ofgem energy price cap. Figures are estimates. Actual prices vary by region, supplier, tariff, payment method and meter type.