Energy Converter
Calories, kilojoules, BTU, kWh — any pair. Useful when comparing appliance power use against food energy.
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Calories, kilojoules, BTU, kWh — any pair. Useful when comparing appliance power use against food energy.
How to use Energy Converter
- Open the toolNo signup and nothing to install; it works as soon as the page loads.
- Set “Value”
- Set “From”
- Set “To”
- Read the resultChange any input and the result is recalculated immediately.
Worked example with the defaults
- KJ · 100 kcal = 23900.60 kj
- 23900.60
Nothing you enter leaves your device
All of the work happens inside your browser. Whatever you type is never packaged up and sent to a server, and no request this page makes carries it.
That makes it safe for contract amounts, personal details and internal documents you would rather not hand to a third party — close the tab and it is gone.
What this tool does not do
Energy Converter only does what a browser can do on its own — it talks to no backend service. So it keeps no history for you and syncs nothing across devices; if you need a record, copy or download the result.
It is also not a substitute for professional judgement. For legal, medical or tax decisions, treat the output as a starting point rather than a final answer.
Frequently Asked Questions
- Is food calorie the same as physics calorie?
- No. The kcal on food labels equals 1,000 small calories. Physicists tend to use the small cal; nutrition labels always mean kilocalories.