Last updated: August 2026
Energy Calculator UK (energycalculator.uk) is a free estimation tool run by the Energy Calculator UK team. By using this site, you agree to these terms.
All figures shown by our calculators are estimates based on published data and standard assumptions. They are not energy advice, financial advice, or recommendations to buy, sell, or switch any product or service. Your actual energy costs will vary depending on your specific tariff, appliance efficiency, usage patterns, home insulation, and other factors we can't account for.
You should not rely solely on our estimates when making financial decisions. If you need advice about energy supply, switching, or energy efficiency measures for your home, speak to a qualified energy assessor or your energy supplier.
We use electricity and gas rates published by Ofgem in their quarterly price cap announcements. We update these within 48 hours of each new cap taking effect. Appliance wattages come from manufacturer specifications and published data from the Energy Saving Trust. Solar yield data comes from published UK irradiance studies and MCS performance estimates.
While we take care to keep data current and accurate, we can't guarantee it's error-free. If you spot a mistake, please let us know and we'll correct it promptly.
The content, design, and code of this site belong to Energy Calculator UK. You're welcome to share links to any page. You may not copy, reproduce, or republish our content (including calculator interfaces, editorial text, or page designs) without written permission.
We occasionally link to external sites such as Ofgem, the Energy Saving Trust, and gov.uk for reference. We don't control those sites and aren't responsible for their content. Links don't imply endorsement.
This site displays advertisements via Google AdSense. Ads are clearly distinguishable from editorial content. We don't control which specific ads appear; Google's system places them based on page content and user browsing history (if cookies are accepted). The presence of an ad on our site does not constitute our endorsement of the advertised product or service.
To the fullest extent permitted by law, Energy Calculator UK accepts no liability for any loss, damage, or inconvenience arising from the use of this site or reliance on its calculations. This includes (without limitation) any financial loss arising from decisions made based on our estimates.
Nothing in these terms excludes or limits liability for death or personal injury caused by negligence, fraud, or any other liability that cannot be excluded by law.
We aim to keep the site available 24/7 but can't guarantee uninterrupted access. We may take the site offline for maintenance without notice. We're not liable for any period of unavailability.
We may update these terms at any time. The "last updated" date at the top reflects the current version. Continued use of the site after changes constitutes acceptance of the revised terms.
These terms are governed by the laws of England and Wales. Any disputes will be subject to the exclusive jurisdiction of the courts of England and Wales.
Questions about these terms? Email hello@energycalculator.uk.