Understanding Gas Value

How long does £10 of gas last? It depends entirely on what you are using it for. The gas central heating cost per hour is far higher than the cost of a hot shower, even though both draw from the same meter. Understanding these energy costs is the first step to managing your gas bill.

This UK gas usage calculator breaks down your spending into practical, real-world terms. Whether you are budgeting for winter bills or comparing tariffs across suppliers, these figures make it easier to understand where your money goes. You can also check how long does £20 of gas last, or any other amount.

Current gas prices (Q2 2026): Most UK homes pay around 5.74p per kilowatt hour (kWh) of gas under the Ofgem price cap (Apr-Jun 2026). You can adjust the rate in this gas cost calculator if you are on a different tariff.

Calculate Your Gas Value

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With of gas, you can power:

What £10 of Gas Gets You

Based on the current Ofgem price cap rate (Apr-Jun 2026), here is what £10 of gas can power across different household appliances:

The Heating Reality

So how much does a combi boiler cost to run? A typical 24kW combi boiler operating at full capacity consumes around £1.38 worth of gas per hour at current gas prices. That makes the cost to run a gas boiler per hour the single largest energy usage in most UK homes. To put that figure into perspective:

In practice, boilers do not operate continuously. They cycle on and off to maintain the target temperature set on your thermostat. In a well-insulated property, the boiler may only fire for 30-50% of the time your heating is scheduled to run, which reduces how much gas a boiler uses per hour in real terms.

Even so, if you are wondering why is my gas bill so high, space heating is almost certainly the answer. It remains by far the dominant component of energy costs for UK homes during winter.

Hot Water Costs

After heating, the cost of heating and hot water for washing is the second-largest category of gas consumption. How much does a hot shower cost? And is a bath cheaper than a shower? The answers may surprise you.

Shower vs bath cost UK: An 8-minute shower uses around 0.8 kWh and costs approximately 5p in gas. The cost of running a bath is roughly 23p for a standard 80-litre tub. That represents a 5x difference in the amount of energy per wash - so showers are considerably cheaper to run.

A family of four taking one minute shower each (8 minutes) per day would spend around £1.30 per week. Over a year, the average cost of shower gas totals about £67.

On top of showers, you use hot water to heat the water for washing up, cleaning, and laundry. Most households use 100 to 150 litres - a significant amount of water per day. The combined gas cost typically runs between £15 and £25 per month, depending on family size and habits.

Cooking Costs

Compared to heating and hot water, cooking represents a relatively minor share of household gas consumption. The running costs for most gas cooking appliances are lower than many people expect:

Even households that cook frequently will typically spend under £10-15 per month on gas for cooking alone. That makes it a relatively small proportion of the overall gas bill compared to heating and hot water.

Good to know: These figures are estimates based on typical appliance specifications. Your actual consumption will depend on factors including boiler efficiency, property insulation, appliance age, and individual usage patterns. For precise data, refer to your own meter readings.

What About Standing Charges?

The daily standing charge is a fixed fee for maintaining your gas connection, regardless of whether you consume any gas at all. Under the Q2 2026 price cap, this charge is approximately 32.7p per day, which works out to roughly £9.80 per month or £119 per year.

In practical terms, roughly £10 of a typical £50 monthly gas bill is absorbed by the standing charge alone. The calculator above focuses exclusively on unit consumption costs, not standing charges.

Getting More From Your Gas

Understanding where your gas consumption is concentrated makes it easier to identify the most effective ways to reduce your bill:

How We Calculate This

Our calculations are based on standard energy consumption figures for common UK household appliances:

We use the Q2 2026 Ofgem price cap rate (Apr-Jun 2026) as the default. Your costs may differ depending on your tariff, boiler age, and how you use each appliance.

All figures assume mains natural gas supply. If your property uses LPG or bottled gas, your unit rate will be considerably higher and these estimates would not apply directly.

It is also worth noting that gas consumption varies significantly between seasons. During winter months, heating can account for 70-80% of your total gas expenditure. In summer, consumption drops considerably since demand is limited to hot water and cooking. As a result, £10 of gas lasts substantially longer in July than it does in January.

Note that this gas money calculator focuses on gas costs only. Your electricity bill and electricity costs are separate and not covered here. If you want to understand your total energy costs across both fuels, you will need to look at your gas and electricity bills together.