Electricity and gas bill calculator UK
Combine actual electricity and gas usage with separate unit and standing rates. Check the formula, worked example and limits before using your own figures.
Enter your figures
Combined bill estimate
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. Use actual rates, especially outside the dated GB reference or in Northern Ireland. Excludes credits, debt, adjustments and multi-rate tariffs.
How the electricity and gas bill calculator uk works
Add each fuel’s usage cost and standing charge for the same billing period.
UK data and rules
October–December 2026 data · Checked 16 October 2026. Rules are a dated snapshot, not a live feed.
Read about data coverage and updates
Worked example: electricity and gas bill
This illustration uses the calculator’s example inputs. It is not a quote or a recommended financial decision.
- Electricity kWh
- 250
- Gas kWh
- 1,000
- Electricity pence per kWh
- 26.32
- Gas pence per kWh
- 7.97
- Electricity standing pence per day
- 54.83
- Gas standing pence per day
- 29.68
- Bill days
- 30
Combined bill estimate: £170.85
Add each fuel’s usage cost and standing charge for the same billing period.
Electricity and gas bill: questions answered
What does the electricity and gas bill calculation include?
Add each fuel’s usage cost and standing charge for the same billing period. Use your actual figures. Any prefilled price, fee, rate or return is an editable illustration, not a current product quote. Use actual rates, especially outside the dated GB reference or in Northern Ireland. Excludes credits, debt, adjustments and multi-rate tariffs.
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