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About this tool
Convert electronvolts to kilocalories instantly. Free, bidirectional, and fully in-browser.
1 electronvolt equals 3.829294e-23 kilocalories — enter any electronvolt value to convert it to kilocalories instantly. This Electronvolt to Kilocalorie converter is a client-side tool: it applies a single multiplication (kcal = eV × 3.829294e-23) in your browser, updates the moment you type, and works in both directions — edit either field, or press swap, to convert kilocalories back to electronvolts. A reference table lists common electronvolt values already converted, and nothing you enter is sent to a server.
Open Electronvolt to Kilocalorie Converter on AltFTool — it loads instantly in your browser.
Type the value you want to convert into the Electronvolt field.
Read the equivalent in kilocalories in the result field, and copy it if needed.
Use the decimal-places slider for more or less precision, or press swap to convert kilocalories to electronvolts.
The result updates as you type, and the swap button flips the conversion to kilocalorie → electronvolt without reloading.
The conversion uses the precise factor (kcal = eV × 3.829294e-23), so the number matches a manual calculation to the decimal places you choose.
A slider sets 0–10 decimal places, and very small or very large results switch to scientific notation instead of rounding to zero.
Everything runs locally in your browser — no upload, no account, no limit on conversions.
One electronvolt is 3.829294e-23 kilocalories. Multiply the electronvolt value by 3.829294e-23 to convert. For example, 10 eV = 3.829294e-22 kcal.
kcal = eV × 3.829294e-23. This tool applies it automatically and shows a worked example: 10 eV = 3.829294e-22 kcal.
Yes. Press the swap button, or type into the kilocalorie field, and the tool converts kilocalories to electronvolts using the inverse of the same relationship.
It uses the standard energy and work definition (kcal = eV × 3.829294e-23), not a rounded approximation, so results are exact to the number of decimal places you select.
Yes. The converter is a browser-side script with no network calls: your values are never uploaded, and once the page has loaded it keeps working without a connection.
Add the Electronvolt to Kilocalorie Converter widget to your blog or website — free, responsive, no signup. Just keep the “Widget by AltFTool” credit link visible.
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