Calculators
Work out what your energy actually costs
Three simple calculators built on the rates Ofgem currently caps: your yearly bill, what everyday appliances cost to run, and what the next cap change means for you.
Rates in use: Ofgem price cap for 1 Jul – 30 Sept 2026, England, Scotland & Wales average, including VAT.
Calculator 1
Energy bill calculator
Enter how much gas and electricity you use in a year. Leave a box empty to use Ofgem's typical household usage.
Figures update as you type. For rates in your own Ofgem region, use the regional prices table.
Estimated annual cost
£1,663
- Monthly equivalent
- £139
- Electricity
- £862
- Gas
- £802
- Energy you use
- £1,349
- Standing charges
- £315
- Estimate at next cap
- £1,723
Uses Ofgem capped direct debit rates for 1 Jul – 30 Sept 2026, including VAT and standing charges.
Calculator 2
Appliance cost calculator
What everyday electrical things cost to run, at today's capped electricity unit rate. Add how many times a week you use each one to see the yearly cost.
| Appliance | Energy used | Cost per use | Times a week | Cost per year |
|---|---|---|---|---|
| Boiling a kettlePer boil | 0.11 kWh | 2.9p | £0.00 | |
| Air fryer30 minutes | 0.75 kWh | 19.6p | £0.00 | |
| Washing machineTypical cycle | 0.63 kWh | 16.4p | £0.00 | |
| Tumble dryerTypical cycle | 2.50 kWh | 65.3p | £0.00 | |
| Electric shower10 minutes | 1.50 kWh | 39.2p | £0.00 | |
| Total per year | £0.00 | |||
Based on 26.11p per kWh, the capped Direct Debit electricity unit rate for 1 Jul – 30 Sept 2026. Energy used per appliance is a typical-use assumption, not a measurement of your own appliance.
Calculator 3
Price cap calculator
The headline cap figure is for a typical household. This shows what the cap means for your usage now, and what changes when the next cap starts.
| Rate | Now | Next cap |
|---|---|---|
| Electricity unit rate | 26.11p/kWh | 26.32p/kWh |
| Electricity standing charge | 57.19p/day | 54.83p/day |
| Gas unit rate | 7.33p/kWh | 7.97p/kWh |
| Gas standing charge | 29.04p/day | 29.68p/day |
Your cost under the current cap
£1,663
- Under the next cap
- £1,723
- Change per year
- +£60
- Change per month
- £5.00
Next cap period: 1 Oct – 31 Dec 2026. The cap limits unit rates and standing charges, not your total bill.
Coming next
More calculators on the way
- Economy 7 versus a single rate
- Fixed tariff versus the price cap
- Solar panels and batteries
- Heat pump running costs
- Standing charge comparison
- Smart meter savings
Every calculator uses published Ofgem cap rates. See our methodology for how the figures are worked out.