- A 150 W heated throw costs 3.9p an hour at full power, or 11.8p for a 3-hour evening.
- Prices from the Ofgem price cap, 1 October to 31 December 2026: the average for England, Scotland and Wales is 26.32p per kWh by Direct Debit. Your region and tariff change it, so use the calculator below.1
- Last checked: 28 October 2026.
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How much does a heated throw cost per hour?
Costs at 150 W, a published throw rating, for 1, 3 and 9 hours (its longest timer setting).
| Power | 1 hour | 3 hours | 9 hours |
|---|---|---|---|
| 150 W | 3.9p | 11.8p | 35.5p |
How to work out the cost
Multiply the power in kilowatts by the hours it runs, then by your electricity unit rate. If the power is in watts, divide by 1,000 first.
For example: 150 W x 3 hours x 26.32p per kWh = 11.8p.1
That is the cost at full rated power. If a thermostat switches the appliance off once the room is warm, it uses less. Standing charges are paid whatever you use, so they are not part of the cost of switching it on.
Typical heated throw power
The Dreamland Snuggle Up Electric Warming Throw (160 x 120 cm) is rated at 150 W on its label, and its manual says: “The throw has an automatic shut off timer of 1,3 or 9 hours.”2 Models are named only as examples of published ratings, not recommendations.
Throws differ, so check the wattage on yours: some use more power than this.
A throw warms you, not the room
A heated throw keeps the person under it warm. It uses much less power than a room heater: 150 W for an hour is 3.9p, against 52.6p for a 2 kW heater.
Next steps
1. Check the throw's wattage on its label.
2. Use the timer so it switches itself off.
3. Work out your own cost with the calculator above.
Help with energy bills
If you are struggling with energy bills, check the help you may be able to get. These checkers are free and need no account.
Who these figures cover
The prices are from Ofgem's price cap for England, Scotland and Wales, 1 October to 31 December 2026.1 In Northern Ireland, use the unit rate on your bill in the calculator.
There is no VAT on household electricity in England, Scotland and Wales, and the rates above already reflect this.1 HMRC: “The temporary zero rate applies from 1 October 2026 to 30 June 2027.” The Budget on 28 October 2026 extended it from 31 March (announced; the legislation is due in early 2027). Gas stays at 5% VAT.4