Boiler gas cost for heat demand calculator UK
Estimate gas input and cost from useful heat demand and boiler efficiency. Check the formula, worked example and limits before using your own figures.
Enter your figures
Gas usage cost for heat demand
Inputs changed. Select Calculate result to update your estimate.
Use your actual figures. Any prefilled price, fee, rate or return is an editable illustration, not a current product quote. No standing charge, installation, maintenance or heat-loss forecast. Use consistent heat-demand and efficiency definitions, rather than comparing nameplate ratings alone.
How the boiler gas cost for heat demand calculator uk works
Gas input = useful heat ÷ efficiency fraction. Cost = gas input × unit price.
Data basis: mathematical formula using your inputs. Example prices and rates are illustrative, not current market quotes.
Read about data coverage and updates
Worked example: boiler gas cost for heat demand
This illustration uses the calculator’s example inputs. It is not a quote or a recommended financial decision.
- Useful heat required (kWh)
- 6,000
- Boiler efficiency (%)
- 90
- Gas pence per kWh
- 7.97
Gas usage cost for heat demand: £531.33
Gas input = useful heat ÷ efficiency fraction. Cost = gas input × unit price.
Boiler gas cost for heat demand: questions answered
What does the boiler gas cost for heat demand calculation include?
Gas input = useful heat ÷ efficiency fraction. Cost = gas input × unit price. Use your actual figures. Any prefilled price, fee, rate or return is an editable illustration, not a current product quote. No standing charge, installation, maintenance or heat-loss forecast. Use consistent heat-demand and efficiency definitions, rather than comparing nameplate ratings alone.
Using your result
Example inputs are a starting point. Replace them with your figures and select Calculate result. Results are rounded for display; calculations use unrounded values.
Explore all 205 UK calculators