Kilojoule to Kilocalorie (kJ to kcal)
Result
0.2390057361 Kilocalorie
Formula
kcal = kJ × 0.2390057361
1 kJ = 0.2390057361 kcal, and 1 kcal = 4.184 kJ.
The joule is the SI unit of energy. The calorie used here is the thermochemical calorie, exactly 4.184 J; a kilowatt-hour is exactly 3.6 MJ; the BTU is the International Table BTU (1,055.05585262 J).
Worked examples
- 100 kJ × 0.2390057361 = 23.900574 kcal
- 500 kJ × 0.2390057361 = 119.50287 kcal
- 1,000 kJ × 0.2390057361 = 239.00574 kcal
- 8,700 kJ × 0.2390057361 = 2,079.3499 kcal
Things to know about kJ to kcal
- Divide by 4.184. Australian and New Zealand labels use kilojoules; their 8,700 kJ adult reference is about 2,079 kcal.
- EU labels list both: the kJ figure is always about 4.2 times the kcal figure.
Kilojoule to Kilocalorie table
| Kilojoule (kJ) | Kilocalorie (kcal) |
|---|---|
| 1 | 0.23900574 |
| 2 | 0.47801147 |
| 5 | 1.1950287 |
| 10 | 2.3900574 |
| 20 | 4.7801147 |
| 50 | 11.950287 |
| 100 | 23.900574 |
| 500 | 119.50287 |
| 1,000 | 239.00574 |
| 8,700 | 2,079.3499 |
The units
- Kilojoule (kJ)
- Kilojoule: 1,000 joules. Food labels in Australia, New Zealand and the EU show kJ.
- Kilocalorie (kcal)
- Kilocalorie (thermochemical): exactly 4,184 J. The "Calorie" on food labels.
Sources for these factors
- Guide for the Use of the International System of Units (SP 811), Appendix B: conversion factors — NIST
- The International System of Units (SI Brochure), 9th edition — BIPM
Last reviewed against these sources. An automated check recomputes every factor from its definition on each build. How we check accuracy