HOME HEATING COST
Boiler running cost calculator
Estimate gas input and boiler running cost from output, efficiency and tariff.
Estimated result
£186
- Gas input
- 3000 kWh
- Daily cost
- £6.20
- Useful heat
- 2700 kWh
Boilers modulate and cycle; output is not necessarily the rated maximum.
SOURCES & REVIEW
Checked against official guidance
Last checked 14 July 2026 · Rule version GB-2026.27.1
Ofgem: Energy advice ↗COMMON QUESTIONS
Frequently asked questions
Is this an exact quote or tax return?
No. It is an estimate based on the inputs and assumptions shown.
When was this checked?
The method and linked official guidance were reviewed for the current UK release.