UK Fin Lab

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BILLS

Energy Bill Estimator

Estimate your household electricity and gas costs using annual usage, unit rates and standing charges. Great for comparing tariff examples, checking rough yearly costs or turning quoted rates into a usable monthly estimate.

Enter your energy details

Example default: 2,700 kWh per year.

Set to 0 if the property is all-electric.

Usually 365 unless you want to model a shorter or longer year.

Estimated annual bill £1,844.25
Average monthly cost £153.69
Average weekly cost £35.47
Average daily cost £5.05

Fuel breakdown

Fuel Usage cost Standing charges Annual total Monthly average
Electricity £729.00 £193.45 £922.45 £76.87
Gas £805.00 £116.80 £921.80 £76.82
Total £1,534.00 £310.25 £1,844.25 £153.69

Inputs used

Electricity usage 2,700.00 kWh
Gas usage 11,500.00 kWh
Electricity unit rate 27.00p/kWh
Gas unit rate 7.00p/kWh
Electricity standing charge 53.00p/day
Gas standing charge 32.00p/day
Days charged 365

How to read this estimate

  • This estimator uses the annual kWh usage and tariff values you enter.
  • Standing charges are applied for each day in the year, even if usage is low.
  • Figures are estimates and do not include discounts, credits, debt repayment plans or tariff changes during the year.

How this energy bill estimator works

This calculator estimates your household energy bill from the headline tariff figures you enter. It multiplies your annual electricity and gas usage by their unit rates, then adds daily standing charges across the year.

When this tool is useful

It is useful when you want to sense-check a new tariff, compare a quote with your current plan, budget for a move, or convert annual smart meter or bill usage into a simple monthly estimate.

What to enter

  • Annual electricity usage in kWh from your bill or smart meter summary.
  • Annual gas usage in kWh if your home uses gas.
  • Unit rates in pence per kWh for electricity and gas.
  • Standing charges in pence per day for each fuel.

Important note

This is an estimator, not a supplier bill recreation. Real bills can differ due to direct debit smoothing, credits, discounts, debt repayment plans, tariff changes, regional differences and billing period timing.