Gas Units to kWh Calculator
Convert gas meter units into kWh and cost for metric or imperial meters.
Your result
Updates as you type. Based on 2025/26 UK figures where relevant.
How this is worked out
Metric units are cubic metres. Multiply by the volume correction (1.02264) and calorific value, then divide by 3.6. Imperial meters read hundreds of cubic feet, so multiply by 2.83 first.
Tips
- Find your unit rates and standing charges on your latest bill or in your supplier's app.
- Standing charges are paid every day regardless of usage.
- Always buy materials from the same batch and add a waste allowance for cuts.
Guides for this calculator
- How to Calculate Gas Units to kWh in the UK: Step-by-Step Guide
- Gas Units to kWh: Common Mistakes, Tips and FAQs
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Frequently asked questions
How does the gas Units to kWh Calculator work?
Metric units are cubic metres. Multiply by the volume correction (1.02264) and calorific value, then divide by 3.6. Imperial meters read hundreds of cubic feet, so multiply by 2.83 first.
Where do the default energy prices come from?
They are typical UK price-cap level figures used as a starting point. Replace them with the rates on your own bill for an accurate result.
Do the DIY calculators include waste?
Most include an adjustable waste allowance. 10% is typical; complex layouts may need 15%.
Are the results exact?
They are estimates. Real usage, weather and installation details will change actual costs.
This calculator gives an estimate for general information. It isn't financial, tax, legal or medical advice. Check official figures on GOV.UK or NHS.uk, or speak to a qualified adviser.