Joule to Calorie Converter
Energy · unit-converter
Convert Joule to Calorie with fixed input and output units, a step-by-step formula line, and reference tables. Factors are joule-based; food energy uses thermochemical calories. The full Energy Converter also includes MMBtu, toe, thermal kWh, and MeV/GeV.
Calculator
From: Joule (j)
To: Calorie (cal)
About Joule
The joule is the SI unit of energy. All other units here are converted through fixed joule equivalents.
About Calorie
The small calorie (cal) is 4.184 J in this converter (thermochemical). Do not confuse with the dietary kilocalorie (kcal).
How to convert joules to calories
1 joule is equal to 0.23900573613767 calorie when both are expressed in joule-equivalents:
1 j = (1 J ÷ 4.184 J) cal = 0.23900573613767 cal
Each joule is defined as 1 J and each calorie as 4.184 J in this tool, so one j equals 1 ÷ 4.184 cal = 0.23900573613767 cal.
Let d(j) be the numeric amount in Joule (j), and d(cal) the amount in Calorie (cal). Then:
d(cal) = d(j) × (1 / 4.184)
Equivalently, divide by how many j fit into one cal (joules per cal divided by joules per j):
d(cal) = d(j) ÷ 4.184
Or: calorie = joule ÷ 4.184
Examples
Example #1: Convert 1 j to calorie
1 j = 1 j × (1/4.184) cal = 0.2390057361 cal
1 j = 1 j ÷ 4.184 = 0.2390057361 cal
Example #2: Convert 10 j to calorie
10 j = 10 j × (1/4.184) cal = 2.3900573614 cal
10 j = 10 j ÷ 4.184 = 2.3900573614 cal
Summary
To convert Joule to Calorie, multiply the value in j by the ratio of joules per j divided by joules per cal. Equivalently: value_cal = value_j × (1 / 4.184). Numerically, 1 j equals 0.2390057361376673 cal.
Relationship context
You are converting between SI energy (joules) (Joules) and food / nutrition energy (calories) (Calories). All values are mapped through joules first. The numeric factor is 2.390057e-1.
Conversion tables
| Joule (j) | Calorie (cal) |
|---|---|
| 0.1 | 0.0239005736 |
| 1 | 0.2390057361 |
| 2 | 0.4780114723 |
| 3 | 0.7170172084 |
| 4 | 0.9560229446 |
| 5 | 1.1950286807 |
| 6 | 1.4340344168 |
| 7 | 1.673040153 |
| 8 | 1.9120458891 |
| 9 | 2.1510516252 |
| Joule (j) | Calorie (cal) |
|---|---|
| 10 | 2.3900573614 |
| 20 | 4.7801147227 |
| 30 | 7.1701720841 |
| 40 | 9.5602294455 |
| 50 | 11.9502868069 |
| 60 | 14.3403441683 |
| 70 | 16.7304015296 |
| 80 | 19.120458891 |
| 90 | 21.5105162524 |
| 100 | 23.9005736138 |