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Where the rates on this site come from
Every price and conversion factor, its source and the date it was opened. Anything not listed here is an example you are asked to replace.
| Number | Value | Source | Opened |
|---|---|---|---|
| US average residential electricity price | 18.16 ¢/kWh (August 2026) | EIA, Electric Power Monthly, Table 5.6.A | 2026-11-14 |
| US state residential prices | 51 rows (50 states and DC), same table | EIA, Electric Power Monthly, Table 5.6.A | 2026-11-14 |
| US natural gas residential price, national | $15.34 per 1,000 cubic feet (2025 (annual average)); the same series was 16.16 in March 2026 and 27.05 in August 2026 (monthly) | EIA, Natural Gas Prices summary (annual and monthly) | 2026-11-14 |
| US natural gas residential price, by state | 45 states with a 2025 annual figure; the rest are not published for 2025 and use the national figure | EIA, Natural Gas Prices summary, residential price, annual by area | 2026-11-14 |
| US gas used per household | 59.54 thousand cubic feet in 2024 (4,389,004 million cubic feet / 73,719,064 residential consumers) | EIA, Natural Gas Consumption by End Use and Number of Natural Gas Consumers | 2026-11-14 |
| UK typical household bill | £1,723 a year, Oct to Dec 2026 | Ofgem, energy price cap explained | 2026-11-14 |
| UK typical use (medium) | gas 9,500 kWh, electricity 2,500 kWh a year, from 1 July 2026 | Ofgem, Review of typical domestic consumption values: decision (Table 1) | 2026-11-14 |
| Great Britain electricity price | 26.32 p/kWh (1 October to 31 December 2026) | Ofgem, energy price cap unit rates | 2026-11-14 |
| Great Britain gas price | 7.97 p/kWh (1 October to 31 December 2026) | Ofgem, energy price cap unit rates | 2026-11-14 |
| Btu per unit of fuel | kWh 3,412; therm 100,000; cubic foot of gas 1,036; gallon of heating oil 138,500; gallon of propane 91,452 | EIA, Units and calculators explained | 2026-11-14 |
What the figures are and are not
The US electricity figures are monthly averages for the whole state for August 2026, as published by the EIA. They include every household in the state, so they will not match your bill exactly. Electricity is a single month (August), so it can sit above or below a full-year average.
Gas uses the full-year 2025 average, because the monthly gas price swings: the same EIA series was 16.16 dollars per 1,000 cubic feet in March 2026 and 27.05 in August 2026. A heat pump versus furnace answer can flip across that range, which is why the heat pump page shows the break-even fuel price. Use the price on your winter bills when you have it.
The UK figures are Ofgem's average unit rates for people who pay by Direct Debit for 1 October to 31 December 2026. The standing charge, which is paid every day on top of the unit rate, is not part of any calculation here.
These pages quote two ENERGY STAR statements: sealing and insulating can give up to 10% savings on annual energy bills, and a typical household's energy bill is around $1,900 a year. The $1,900 is the default bill for the payback page and 10% is its quick pick ceiling; both are US figures, and the UK setting uses Ofgem's £1,723 bill with the same percent because no UK equivalent was opened. They are marked as assumptions on the screen. ENERGY STAR also says a heat pump can deliver up to three times the heat energy it consumes in electricity; the COP default of 2.5 is our own assumption, set below that.
Examples such as the 1,500 W heater or an 800 therm year are illustrations, not data. Replace them.