Personal warmth comparison · UK energy estimate

Electric Blanket vs Electric Heater Running Cost

Compare the cost of an electric blanket or heated throw with an electric room heater at your UK tariff.

Published and reviewed 18 July 2026 · By CalcBeast · Estimates run in your browser

Compare your own tariff

Cost comparison

Electricity price p/kWh

Default: 26.11p/kWh, 1 July 2026–30 September 2026. This is an Ofgem average; your region, tariff and payment method can differ. View Ofgem's price-cap rates.

Electric blanketOne overnight use

Per use—

30 days—

Heated throwOne evening use

Per use—

30 days—

Electric room heaterOne evening use

Per use—

30 days—

Transparent formula

How the estimate works

(watts ÷ 1,000) × hours × your unit rate

For the monthly figure, the calculator repeats that use for 30 days. Change the tariff above to use the rate from your bill.

Worked example

What that means in practice

At the default rate, running a 100W electric blanket overnight normally costs less than running a 2kW room heater for a single hour.

Before you compare

Assumptions and limitations

An electric blanket warms a person or bed; a heater warms room air and surfaces.
Electric heaters may cycle with a thermostat, so actual energy use can be lower than rated watts.
Follow the manufacturer safety instructions and never use damaged heated bedding.

Power draw can vary with a thermostat, mode, room conditions and appliance model. This is a running-cost estimate, not a performance or safety recommendation.