How much does 1 hour of gas cost in the UK?

The cost of running gas appliances for one hour depends on what you are using. As of 2025, the Ofgem price cap sets the unit rate for gas at around 6 to 7 pence per kilowatt hour (kWh), though this changes quarterly.

A typical combi boiler rated at 24kW running for a full hour would use roughly 24kWh, costing around £1.50 to £1.70. A gas hob burner uses far less, perhaps 1 to 2kWh per hour, costing just a few pence.

A gas fire running at full output might cost 50 to 80 pence per hour. Your actual costs will depend on your tariff and the efficiency of your appliances.