See the kWh equivalent of a gas meter reading, or reverse a supplier's kWh figure back into approximate m³. If your meter shows cubic feet (ft³) rather than cubic metres (m³), select the imperial option and the converter will automatically apply the standard 1 ft³ = 0.0283168 m³ factor. Use the default assumptions for a quick estimate or open the advanced settings to match the exact figures shown on your bill.
Converted to kWh:
0 kWh
- Formula used
- m³ × calorific value × volume correction factor ÷ 3.6
- Calorific value
- 39.5 MJ/m³
- Volume correction factor
- 1.02264
Calculated by SmartMoneyTools.co.uk
- How do I convert m3 to kWh for a gas bill?
- Enter the gas volume in cubic metres and the converter applies the standard UK billing formula using calorific value, a volume correction factor, and division by 3.6 to reach kWh. If your meter shows cubic feet (ft³) instead of cubic metres, select Imperial (ft³) as the meter type first. If your supplier has already converted to kWh, switch the converter direction and work backwards instead.
- Can I change the calorific value or volume correction factor?
- Open advanced settings if your bill shows a different calorific value or correction factor and you want the conversion to match your supplier more closely.
- What figures do most UK household bills use?
- The volume correction factor is normally 1.02264. The calorific value varies, so suppliers bill using an average figure for your area and billing period. This converter starts with a representative default of 39.5 MJ/m³, but use the value printed on your bill if you want the closest match.
- Will this work for an imperial gas meter?
- Yes. Select Imperial (ft³) under Meter type and enter your cubic feet reading directly. The converter automatically multiplies by 0.0283168 to convert ft³ to m³ before applying the standard kWh formula — so the result is equivalent to what a metric meter would show for the same volume of gas. Imperial meters are less common but are still found in some older UK properties.
- Where can I estimate the full cost of my gas bill?
- Use the Gas Bill Calculator if you want to turn gas usage into an estimated bill including unit rates, standing charges, and VAT.
Have you tried our Gas Bill Calculator?
Estimate your next gas bill from meter readings or direct kWh usage, plus your unit rate and standing charge.
Gas Bill CalculatorIs something wrong?
Or do you have a suggestion? Check the FAQ first, or send us a message:
Want to include your details? Use the contact page instead.