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Energy converter
Convert joules, calories, kilocalories, kWh, BTU and electronvolts.
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About Energy converter
Switch among joules, calories, kilocalories, kilowatt-hours, BTU and electronvolts. The food Calorie is really a kilocalorie, equal to 4184 joules, while one kWh is 3.6 million joules. Handy for diet labels, electricity bills and heating or cooling specs.
How to use Energy converter
- Enter the energy amount and pick its unit.
- Choose the unit to convert to, such as kWh or BTU.
- Read the result in the list of energy units.
Why use this tool?
- Private: everything happens in your browser. Nothing you enter is uploaded.
- Free, with no sign-up, no watermark and no limit on how often you use it.
- Works on phones, tablets and computers: Android, iPhone, Windows, Mac and Linux. Nothing to install.
- Free to embed on your own website, with a ready-made code to copy.
- Available in 10 languages.
Also known as
Frequently asked questions
Is a food Calorie the same as a calorie?
No. A food Calorie (capital C) is a kilocalorie, which is 1000 small calories or about 4184 joules.
How do I turn kWh into joules?
One kilowatt-hour is 3.6 million joules. Multiply your kWh by that number, or let the tool do it, to compare electricity use with energy figures in joules.
Why are there different calorie values?
A small calorie and a kilocalorie differ by a factor of 1000, and some calories are defined slightly differently. Check which one a source means before you compare numbers.
Is Energy converter free?
Yes. Energy converter on Toolipedia is free to use, with no sign-up and no watermark.
Is it safe to use?
Yes. Everything is worked out in your browser, and nothing you enter is sent to our server.
Does it work on my phone?
Yes. It works in any modern browser on Android and iPhone, as well as on tablets and computers. There's nothing to install.
Do I need an account?
No. Just open the page and use the tool. There's no sign-up and no email needed.
Can I put Energy converter on my own website?
Yes. Use the Embed on your site button under the tool to copy a short piece of code and paste it into your page. It is free, needs no account, and the tool keeps working inside your page.