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Energy bill calculators
Free calculators for homes and businesses. No sign-up: each one uses the numbers you enter and explains its formula and limits.
Energy bill calculator
Estimate a yearly and monthly electricity and gas bill from your usage, prefilled with your region’s price-cap rates.
Calculate my bill →Price change planner
Test a unit-rate rise or fall against the energy you expect to use over the next 90 days.
Plan a price change →Appliance running costs
Put a price on the things you run, from a kettle to business equipment, using its power rating and your unit rate.
Check running costs →Seasonal usage planner
Estimate how much of your annual gas or electricity use falls in the next three months, based on UK consumption patterns from 2023 to 2025.
Plan the season ahead →Calculator results are estimates, not quotes. Price-cap rates are Ofgem benchmarks for a dated period; see sources & methodology →