Gas Cost Calculator UK

Free UK gas cost calculator to estimate your gas expenses. Enter your gas usage to see daily, weekly, monthly and yearly costs with current energy prices.

Updated with UK Energy Price Cap rates. Quick estimates for budgeting your energy costs.

Quick estimate by household size:

Gas Usage

Tariff Rates

Default rates based on UK Energy Price Cap (includes 5% VAT).

Estimated Gas Costs

Enter your gas usage or select a preset to estimate costs

Tips to Reduce Your Gas Costs

Turn Down the Thermostat

Reducing your thermostat by just 1°C can cut your heating bill by up to 10%. Aim for 18-21°C for living areas.

Use Heating Timers

Programme your heating to come on 30 minutes before you wake up and turn off 30 minutes before bed. Only heat when you need it.

Improve Insulation

Loft insulation, cavity wall insulation, and draught-proofing can significantly reduce heat loss and lower your gas usage.

Service Your Boiler

Annual boiler servicing keeps it running efficiently. An inefficient boiler can waste significant amounts of gas.

UK Energy Price Cap Rates

The Energy Price Cap is set by Ofgem and reviewed quarterly

Gas Unit Rate

6.24p

per kWh

This is the price you pay for each kilowatt hour of gas you use

Standing Charge

31.66p

per day

Fixed daily charge regardless of how much gas you use

Note: The Energy Price Cap sets the maximum rates suppliers can charge for default tariffs. Your actual rates may be lower if you're on a fixed deal. Rates shown are approximate and subject to quarterly changes by Ofgem. All domestic energy bills include 5% VAT.

Gas Cost Calculator - Frequently Asked Questions

How much does gas cost per kWh in the UK?
Under the current UK Energy Price Cap, gas costs approximately 6.24p per kWh for households on standard variable tariffs. This rate is reviewed and adjusted quarterly by Ofgem. Fixed rate tariffs may offer different rates - check with your supplier for your exact unit rate.
How do I estimate my gas costs?
To estimate gas costs: (1) Find your annual gas usage in kWh from a recent bill or use average figures (8,000-17,000 kWh), (2) Multiply by the unit rate (6.24p/kWh), (3) Add the annual standing charge (365 × 31.66p = £115.56), (4) Add 5% VAT. Our gas cost calculator does this automatically.
What is typical gas usage for a UK home?
Ofgem classifies typical domestic gas consumption as: Low usage - 8,000 kWh/year (small flat, 1-2 people), Medium usage - 12,000 kWh/year (average home, 2-3 bedrooms), High usage - 17,000 kWh/year (large house, 4+ bedrooms). Your usage depends on property size, insulation, occupancy, and heating habits.
How much should I budget for gas per month?
Based on current Energy Price Cap rates and typical usage: Low usage households (8,000 kWh/yr) should budget around £52/month, Medium usage (12,000 kWh/yr) around £76/month, High usage (17,000 kWh/yr) around £106/month. These are averages - winter months will be higher and summer months lower.
Why do gas prices change?
Gas prices are influenced by wholesale energy costs, which fluctuate based on global supply and demand, geopolitical events, weather conditions, and storage levels. In the UK, Ofgem reviews the Energy Price Cap every quarter (January, April, July, October) and adjusts rates based on wholesale costs.
Is gas or electricity cheaper for heating?
Gas is currently much cheaper than electricity for heating. At approximately 6.24p/kWh for gas versus 24.50p/kWh for electricity, gas costs about 4 times less per unit of energy. However, heat pumps can be 3-4 times more efficient than gas boilers, which can make them cost-competitive despite higher electricity prices.