These energy bill calculators show what your electricity and gas really cost, from a single kettle boil to a whole year of heating, for households in the UK, Ireland and the rest of Europe. All 8 tools are free, come pre-filled with the Ofgem price cap rates for October to December 2026, have EU presets in euros, and let you type your own tariff instead.
Quick answer: energy bill calculators multiply the kWh you use by your unit rate and add the daily standing charge. At the UK price cap from 1 October to 31 December 2026, electricity is 26.32p per kWh plus 54.83p a day, and gas is 7.97p per kWh plus 29.68p a day.
All 8 Energy Bill Calculators
The tools fall into three groups: checking a bill, pricing one appliance, and testing a bigger change such as solar panels or a heat pump. Every one of our energy bill calculators shows the kWh, the rate and the sum, so you can compare the result with your own statement.
Bills and tariffs
- Electricity Bill Calculator: your bill from two meter readings, the unit rate, the daily standing charge and any VAT.
- Gas Bill Calculator: converts metric or imperial gas meter readings to kWh using the calorific value, then works out the bill.
- Economy 7 Calculator: checks whether a day and night tariff beats a single rate for your share of night use.
Appliance and transport running costs
- Electricity Cost Calculator: the running cost of any appliance per hour, day, month and year from its watts.
- Electric Shower Cost Calculator: cost per shower and per year for 7.5 to 10.8 kW electric showers.
- EV Charging Cost Calculator: the cost of charging an electric car at home per charge, per mile and per year.
Solar and low carbon heating
- Solar Panel Calculator: yearly output, savings and payback for a home solar PV system.
- Heat Pump Running Cost Calculator: the yearly cost of a heat pump compared with a gas boiler.
Most Popular Energy Bill Calculators
The electricity cost calculator is the most used of our energy bill calculators, because it answers the everyday question of what an appliance costs to run. At 26.32p per kWh, a 2,000 W heater costs 52.64p an hour and a 3,000 W kettle about 79p for every hour it boils.
Of the energy bill calculators, the electricity bill calculator is the one to use when a bill looks wrong. At the current cap rates, 240 kWh over 30 days costs £63.17 for the energy plus £16.45 of standing charges, a bill of £79.62.
The gas bill calculator completes the top three energy bill calculators. Gas meters measure volume, not energy, so the tool converts cubic metres to kWh with the calorific value on your bill. At the October 2026 cap, 100 m³ over 30 days costs about £98.
Which Energy Bill Calculator Do I Need?
Use the bill tools to check what you have already used, the running cost tools to price one appliance or car, and the solar and heat pump tools before you spend money on an upgrade. These energy bill calculators all accept your own rates.
- Checking a monthly or quarterly bill: electricity bill calculator and gas bill calculator with your two meter readings.
- Wondering what a heater, dryer or kettle costs: electricity cost calculator with the watts from the rating plate.
- High bills in a home with an electric shower: electric shower cost calculator per shower and per year.
- Storage heaters or a lot of night use: Economy 7 calculator with your night share.
- Buying or running an electric car: EV charging cost calculator with your home or off-peak rate.
- Thinking about solar panels or a heat pump: solar panel calculator and heat pump running cost calculator.
How Do You Check Your Energy Bill Step by Step?
Check a bill in five steps: read the meter, find your rates, convert gas to kWh, add the standing charge, then compare the total with your statement. Our energy bill calculators do the arithmetic once you have the numbers.
- Take a meter reading on the same day you check, and find the previous reading on your last bill. Never open the meter case or break its seals.
- Find your unit rate and daily standing charge on the bill or in your online account. Rates vary by region and payment method.
- For gas, note whether the meter is metric (m³) or imperial (hundreds of ft³), and the calorific value printed on the bill.
- Enter the readings, rates and number of days into the electricity or gas tool in our energy bill calculators.
- If the totals differ, check whether the bill used an estimated reading, and ask your supplier for the readings they used.
How Much Does Electricity and Gas Cost per kWh in 2026?
Under the UK price cap from 1 October to 31 December 2026, electricity costs 26.32p per kWh plus 54.83p a day, and gas costs 7.97p per kWh plus 29.68p a day, for a typical Direct Debit customer in Great Britain.
These are averages: Ofgem’s price cap rates differ by region and payment method, and fixed tariffs can be higher or lower. The gas rates include 5% VAT. Electricity currently has none, because GOV.UK confirms a temporary zero rate of VAT on domestic electricity from 1 October 2026 to 31 March 2027.
In the EU, Eurostat’s household electricity prices for the second half of 2025 averaged €28.96 per 100 kWh including taxes, with Germany at €38.69 and Ireland at €40.42. Pick the matching preset in the energy bill calculators, or type your own supplier’s rate.
What Do Common Household Energy Uses Cost per Year?
A home using Ofgem’s medium figure of 2,500 kWh of electricity a year pays about £858 at the October to December 2026 cap rates, while heating with gas typically costs more than any single appliance. The table shows default results from our energy bill calculators.
| Energy use | Assumptions | Yearly cost | Tool |
|---|---|---|---|
| Electric shower | 9.5 kW, two 8 minute showers a day | £243.37 | Electric Shower Cost Calculator |
| Electric car | 12,000 km at 18 kWh per 100 km | £631.68 | EV Charging Cost Calculator |
| Heat pump | 9,000 kWh of heat, SCOP 3 | £789.60 | Heat Pump Running Cost Calculator |
| Electricity, medium use | 2,500 kWh plus standing charge | £858.13 | Electricity Bill Calculator |
| Gas boiler | 9,000 kWh of heat at 85% efficiency, with standing charge | £952.21 | Heat Pump Running Cost Calculator |
| Electricity, high use | 3,800 kWh plus standing charge | £1,200.29 | Electricity Bill Calculator |
Why Is the Standing Charge So Important?
The standing charge is paid every day whether you use energy or not, so it is a fixed share of every bill: 54.83p a day for electricity is about £200 a year before you switch anything on.
That fixed share weighs most on low users. On Ofgem’s typical consumption figures, the standing charge is almost a third of a low use electricity bill but only about a sixth of a high use bill. The running cost tools in our energy bill calculators leave it out, because an appliance does not change it, while the bill tools add it for every day of the period.
If you will keep gas only for cooking after fitting a heat pump, keep its standing charge in the heat pump running cost calculator. Capping the supply is a job for a Gas Safe registered engineer or the gas network.
Are Solar Panels and Heat Pumps Worth It?
They can be, but the answer depends on your own numbers: ten 430 Wp panels yielding 900 kWh per kWp save about £741 a year with half the output used at home, and a heat pump with a SCOP of 3 costs £789.60 a year against £952.21 for gas for the same heat.
Payback for that 4.3 kWp solar system is about 9.4 years at 900 kWh per kWp, shorter in sunnier places and longer on shaded roofs. At October 2026 cap prices, a heat pump beats an 85% efficient gas boiler once its SCOP is above about 2.5 if you remove gas completely. Run both energy bill calculators with real quotes before deciding.
Energy Bill Calculators FAQs
Are these energy bill calculators up to date?
Yes. The energy bill calculators were checked in October 2026 and use the Ofgem price cap for 1 October to 31 December 2026, plus Eurostat averages for the EU, Germany and Ireland. You can always replace the presets with the rates on your own bill.
How is my electricity bill calculated?
Your bill is the kWh you used multiplied by your unit rate, plus a standing charge for every day of the period, plus any VAT. At cap rates, 240 kWh over 30 days costs £63.17 plus £16.45, a total of £79.62.
How do I convert gas meter readings to kWh?
Multiply the cubic metres used by 1.02264, then by the calorific value on your bill, and divide by 3.6. For an imperial meter, convert hundreds of cubic feet to cubic metres first. 100 m³ at a calorific value of 39.5 is about 1,122 kWh.
What does it cost to run a 2 kW heater?
A 2,000 W heater uses 2 kWh an hour, which costs 52.64p an hour at the UK cap rate of 26.32p per kWh. Used 6 hours a day, 5 days a week, that comes to about £823 a year.
Is Economy 7 worth it?
Economy 7 is worth it only if you use enough electricity at night. With example rates of 31p by day and 15p at night against a 26.32p single rate, it breaks even at about 29% night use, so storage heater homes usually benefit.
How much does it cost to charge an electric car at home?
Charging a 60 kWh battery from 20% to 80% draws about 40 kWh including losses. That costs £10.53 at the October 2026 cap rate of 26.32p per kWh, or £2.80 at an example off-peak rate of 7p.
Checked October 2026. Sources: Ofgem energy price cap (1 October to 31 December 2026), Ofgem typical domestic consumption values, GOV.UK temporary zero rate of VAT on domestic electricity, Eurostat electricity price statistics, results from each HousyTools tool page.