All calculators
Every tool here is free, works without an account and gives an answer in seconds. Official Ofgem figures fill in anything you leave blank.
- No registration
- No email required
- Instant calculation
- Latest official Ofgem data
Calculators
- Energy bill calculatorTurn unit rates and standing charges into a yearly and monthly cost.
- Electricity cost calculatorCost of your electricity from your rate, standing charge and kWh.
- Gas cost calculatorCost of your gas from your rate, standing charge and kWh.
- Economy 7 calculatorDay and night rates costed on your own split of usage.
- Gas m³ to kWh calculatorConvert gas meter readings to kWh and to a cost.
Compare tariffs
- Compare two tariffsWhich of two tariffs is genuinely cheaper at your usage.
- Tariff break-even calculatorThe usage level where two tariffs cost exactly the same.
- What is 1p per kWh worth?Convert a rate difference in pence into pounds a year.
- Fixed vs variable calculatorPrice a fixed offer against the capped rates across the cap change.
Standing charges
Energy rates
- Is my energy rate good?Enter your rate and see how it compares with the official benchmark for your region.
- Current energy unit ratesOfficial Ofgem unit rates and standing charges for every region, priced at your usage.
- Electricity unit rateWhat a kWh of electricity costs now, and what that means on your usage.
- Gas unit rateWhat a kWh of gas costs now, and what that means on your usage.
Price cap
Not sure where to start?
If you just want to know whether you are being overcharged, start with is my energy rate good? — it compares your rate against the correct official benchmark for your region and payment method.