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Energy Review

Electricity Bill Calculator

Enter the unit rate, standing charge and kWh used over any period. The calculator separates the fixed and usage costs and updates as you type.

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Your usage
Results update as you type
Time period
Electricity
Tip:You can find the standing charge and unit rate on the back of your latest bill, or in your online account. Most suppliers show kWh usage too.

What to enter

  • Choose the period covered by the usage figure.
  • Copy the pence-per-kWh rate and daily standing charge from your tariff.
  • Enter the kWh used during that period.

One unit is one kilowatt-hour (kWh): 1,000 watts used for one hour. The standing charge applies on every calendar day, even when you use no electricity.

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.

Ofgem typical domestic electricity consumption values
BandAnnual (kWh)Monthly averageDaily average
Low1,6001334
Medium2,5002087
High3,80031710

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.

Frequently asked questions

What is a unit of electricity?

One unit is one kilowatt-hour (kWh): 1,000 watts used for one hour. A 3 kW device drawing that constant power for 20 minutes also uses exactly 1 kWh.

What is a daily standing charge?

A daily standing charge is the fixed pence-per-day part of a tariff. This calculator multiplies the rate you enter by the number of calendar days, regardless of the electricity 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; your own annual bill or meter total is the better calculator input.

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Rob Gibbs

Written by

Rob Gibbs

Hi, I'm Rob, and I run Energy-Review.co.uk. I initially started this project in 2018 when I was looking to switch energy suppliers and found there wasn't a website that provided simple, data-backed reviews on all the suppliers available. Since then, I have spent a lot of time (too much, some may say!) looking at all publicly available data about each supplier and writing reviews using this information. These reviews are updated as regularly as possible, and any data is backed up by a source where necessary. I have also started writing guides on various energy-related topics, which hopefully you will find useful. If you find any issues, please use our contact form to let us know.