UK home energy calculators
Estimate appliance electricity running costs using power, hours of use and your electricity tariff.
Choose a home & energy calculator
Electricity running cost calculator UK
Find out what an appliance costs to run.
Home & energyGas usage cost calculator UK
Estimate a gas bill from billed kWh, your unit rate and daily standing charge.
Home & energyElectricity and gas bill calculator UK
Combine actual electricity and gas usage with separate unit and standing rates.
Home & energyGas meter units to kWh calculator UK
Convert a domestic gas meter volume into an energy estimate using bill factors.
Home & energyHeat pump electricity cost calculator UK
Estimate electricity needed for a known heat demand and a chosen efficiency factor.
Home & energyBoiler gas cost for heat demand calculator UK
Estimate gas input and cost from useful heat demand and boiler efficiency.
Home & energySolar output from quoted yield calculator UK
Turn a site-specific annual yield estimate and array size into annual generation.
Home & energySolar simple payback calculator UK
Compare installation cost with annual bill savings, export income and running costs.
Home & energyHome battery tariff-shifting value calculator UK
Estimate the gross margin from shifting a stated quantity of electricity between tariff periods.
Home & energyEnergy standing charge cost calculator UK
Add daily electricity and gas standing charges over a chosen billing period.
Home & energyElectricity tariff comparison calculator UK
Compare two single-rate electricity tariffs using the same annual consumption.
Home & energyMetered water and sewerage bill calculator UK
Estimate charges from a measured water volume and your provider’s prices.
Home & energyElectric shower energy and water cost calculator UK
Estimate both electricity and metered water used by a daily shower pattern.
Home & energyTumble dryer cost per cycle calculator UK
Estimate drying costs using measured or programme-specific energy per cycle.
Home & energyWhere to start
Read the appliance rating in watts and enter the hours it actually runs. Compare different settings or schedules by changing those inputs while keeping the same tariff.
UK data and coverage
The supplied GB cap unit-rate reference is dated and excludes standing charges. Enter your own rate for Northern Ireland, fixed tariffs or other arrangements.
Each calculator explains the formula, includes a worked example and identifies the assumptions that can affect your result. Official rule tables and dated price references are linked on the relevant pages.
Read the data sources and calculation methodology or browse all UK calculators.