Home by Numbers

My Energy

Set your home energy baseline.

Use figures from your electricity and gas bills if you have them. If not, start with the clearly labelled GB assumptions and change anything you want.

These figures can be reused across Solar, Battery, EV, Heating and Tariff comparisons on this device.

Electricity

£1,095per year

Energy used

£895

Standing charge

£200

Every 1p change in your electricity unit rate is worth approximately £34 per year to your household.

Every 1p/day change in your standing charge changes your annual bill by £3.65.

Gas

£865per year

Do you use mains gas?

Usage cost

£757

Standing charge

£108

Every 1p change in your gas unit rate is worth approximately £95 per year to your household.

What if?

Move one assumption at a time and see what changes. Your saved baseline remains unchanged. These sliders change nothing you have saved.

Your home

£1,960per year

Scenario

£1,960per year

Difference

£0per year

Electricity price

26.32p/kWh

p/kWh
5p/kWh60p/kWh

Changing only this value would make your electricity cost approximately £1,095/year.

This is the same as your current figure.

Grid electricity bought

3,400 kWh/year

kWh
500kWh15000kWh

Changing only this value would make your electricity cost approximately £1,095/year.

This is the same as your current figure.

Gas price

7.97p/kWh

p/kWh
2p/kWh20p/kWh

Changing only this value would make your gas cost approximately £865/year.

This is the same as your current figure.

Gas usage

9,500 kWh/year

kWh
0kWh40000kWh

Changing only this value would make your gas cost approximately £865/year.

This is the same as your current figure.

So what?

Your estimated annual bill is £1,960, made up of £1,095 electricity and £865 gas.

Electricity is the larger share of your bill, so changes to your electricity rate or usage move the total the most.

What you could do next

Based on your result, these are the numbers worth checking next. You stay in control — no sales calls from us.

  • Check whether another tariff would suit this usage

    Your electricity and gas figures carry through automatically.

    Open Tariffs

  • See what solar could mean for your electricity

    Solar offsets grid electricity, which is the larger part of your bill.

    Open Solar

  • Compare heating systems on the same useful heat

    Gas heating running costs follow the gas figures you've entered here.

    Open Heating Calculator

  • See what an EV would add to your electricity

    Home charging is estimated from the electricity rate you've set here.

    Open EV

Common questions about this estimate

How is my annual bill estimated?
It multiplies your annual kWh by the relevant unit rate, then adds the standing charge for every day of the year, for electricity and gas separately. The two are added together for the total shown here.
What's the difference between grid import and total use?
Grid import is the electricity you actually buy from the network, which is what your bill charges you for. If you have solar, your total household use can be higher than this, because some of it is met directly from your panels rather than bought in.
What does the price cap mean for these figures?
The price cap sets a maximum unit rate and standing charge for default tariffs, updated every few months. The starting figures here are based on a typical medium household under a recent cap period, but you should replace them with your own rates for an accurate result.
Where do I find these numbers on my bill?
Look for your annual or recent kWh usage for electricity and gas, and the pence-per-kWh unit rate and pence-per-day standing charge for each fuel. These are usually shown together in a tariff summary box on a bill or online account.