Calories to Kilojoules Converter
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserBasic
Convert energy
Amount to convert
From (the unit you have)
To (the unit you want)
Result
4.184
1 Kilocalories / Calories (kcal) = 4.184 Kilojoules (kJ)
All units
- Kilocalories / Calories (kcal)
- 1
- Kilojoules (kJ)
- 4.184
- Calories (cal)
- 1,000
- Joules (J)
- 4,184
- Watt-hours (Wh)
- 1.162222
How to use this calculator
- Enter the amount you want to convert.
- Choose the unit you have (From) and the unit you want (To).
- Read the result instantly — every other unit is listed too.
How it works
Converts food energy from calories to kilojoules by multiplying by 4.184 — the unit on Australian food labels.
Worked example
100 calories. = 418.4 kJ.
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.