Calculate energy use. Check your bill. Compare editable scenarios.
Home Energy Cost Lab is an independent resource for UK households. Every tool shows its formula, worked example, limits, sources and review date; entries stay in the browser.
We are not Ofgem, GOV.UK, an energy supplier or a network operator, and we do not promise savings.
Rates, not a maximum bill
The Ofgem cap limits rates for covered Great Britain default tariffs; use still determines total cost and regional rates vary.
July–September 2026 reference
Average direct-debit rates are 26.11p/kWh plus 57.19p/day for electricity and 7.33p/kWh plus 29.04p/day for gas, including VAT. Ofgem showed £1,862 under the former typical-use values and £1,663 under revised values effective from July.
Checkable method
Pick the matching calculator, use one time period and verify the result against the live tariff and official source.
Frequently asked questions
Do you sell energy tariffs?
No. This package provides independent calculators and explanations.
Are my entries stored?
No. The included calculators run locally in the browser.
Sources and review date
Content reviewed on: 2026-08-03.
- Ofgem – price cap rates, 1 July to 30 September 2026 — average unit rates, standing charges and regional tables
- Ofgem – July 2026 cap and revised typical consumption — £1,862 old TDCV and £1,663 revised TDCV
- Ofgem – price cap and standing charges explained — scope and variation