Energy Bill Calculator
Estimate how much you should expect to pay for gas and electricity over any time period — daily, monthly or annually.
Enter the rates and usage from a recent bill to calculate gas, electricity or both. The result separates standing charges from energy use and updates as you type.
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Are you being overcharged?
A total on its own does not tell you whether it is fair. What does is your unit rate and standing charge next to the maximum Ofgem allows for your region and payment method — the two things the price cap actually limits.
Are your rates above the price cap?
The cap limits unit rates and standing charges, not your total bill — a household using more energy pays more and is still capped. Put your own rates in and compare them against the published maximum for your region and payment method.
| Rate | Yours | Cap | Verdict |
|---|---|---|---|
| Electricity unit rate | — | 26.32p | — |
| Electricity standing charge | — | 54.83p | — |
| Gas unit rate | — | 7.97p | — |
| Gas standing charge | — | 29.68p | — |
If your rates are within the cap and the bill is still more than you can pay, that is affordability rather than overcharging. The consumer scheme register records what each scheme is, what it is worth and where to apply. It does not decide whether you qualify, and nothing on this page is an eligibility test — read the published criteria and apply officially.
What to enter
- Choose a period and enter how many days, weeks, months or years it covers.
- Copy each unit rate and daily standing charge from your tariff.
- Enter the kWh used in that same period.
Electricity and gas are billed in kWh. If you only have gas meter readings in cubic metres or cubic feet, convert them first with the gas meter reading calculator. Standing charges apply for every calendar day, even when no energy is used.
How much electricity a typical UK household uses
If you do not know your annual usage, use these low, medium and high benchmarks as a rough comparison. The medium value is used for the illustrative price-cap bill.
| Band | Annual (kWh) | Monthly average | Daily average |
|---|---|---|---|
| Low | 1,600 | 133 | 4 |
| Medium | 2,500 | 208 | 7 |
| High | 3,800 | 317 | 10 |
Current from 1 July 2026. Monthly and daily figures are the annual values divided by 12 and 365. These figures are for single-rate meters. Use your own bill where possible.
How much gas a typical UK household uses
If you do not know your annual usage, use these low, medium and high benchmarks as a rough comparison. The medium value is used for the illustrative price-cap bill.
| Band | Annual (kWh) | Monthly average | Daily average |
|---|---|---|---|
| Low | 6,000 | 500 | 16 |
| Medium | 9,500 | 792 | 26 |
| High | 14,000 | 1,167 | 38 |
Current from 1 July 2026. Monthly and daily figures are the annual values divided by 12 and 365. Use your own bill where possible.
Frequently asked questions
What is a unit of electricity?
One unit is one kilowatt-hour (kWh): 1,000 watts used for one hour.
What is a unit of gas?
Gas is billed in kilowatt-hours (kWh), while a gas meter usually records cubic metres or cubic feet. Enter the kWh shown on your bill here; converting meter readings also needs the meter type and bill calorific value.
What is a daily standing charge?
A daily standing charge is the fixed pence-per-day part of a tariff. This calculator multiplies the entered rate by the number of calendar days, regardless of the energy used.
How much electricity does a typical UK household use?
Ofgem’s medium single-rate Typical Domestic Consumption Value is 2,500 kWh a year from 1 July 2026; the previous medium value was 2,700 kWh. Ofgem publishes low, medium and high bands rather than figures by bedroom.
How much gas does a typical UK household use?
Ofgem’s medium gas Typical Domestic Consumption Value is 9,500 kWh a year from 1 July 2026; the previous medium value was 11,500 kWh. These are benchmark assumptions, not measured household averages.
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