What does an electric blanket cost to run?
Pennies an hour — one of the cheapest ways to stay warm, because it heats you rather than the room around you.
Typical model is rated 100W
Price cap is 26.11p
3p per hour, 240 hours a year, 24 kWh in total — about £1 a month. Costed over 120 days, not the whole year — this is a winter appliance.
An electric blanket draws around 100 watts on its highest setting and far less once warmed through, because it only has to maintain heat, not generate it against a cold room. Heating the person instead of the space is why it is one of the cheapest comfort appliances there is — a whole winter of nightly use costs a small fraction of running the central heating for the same hours.
The saving is real only if it genuinely replaces heating rather than adding to it. Used to take the chill off the bed so you can turn the bedroom radiator down, it pays for itself many times over across a winter.
The short answer: Pennies an hour, and a genuine way to cut the heating bill if it lets you turn a radiator down.
What actually helps
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This is the small stuff
Every appliance on this site put together is usually less than a third of a typical energy bill. Heating the house is the rest of it. If the numbers here bothered you, the number that actually matters is what your heating costs — and whether a heat pump would make it better or worse in your particular house.
Work out your heating costOther appliances
Energy figures checked 2026-08-26. Electricity priced at the Ofgem cap for 1 July – 30 September 2026. Your own machine and tariff will differ — put your figures in above.