Calorie (th) to Kilojoule Converter

Energy Converter

27 units available

Decimals:

From

To

0.004184

1 cal = 0.004184 kJ

Formula:

kJ = cal × 0.004184

With your value: 1 cal = 0.004184 kJ

How big is that?

Everyday references on a logarithmic scale, all expressed in calorie (th) so you can sanity-check the result.

Heartbeat (1/4.2 your value)0.239 cal

Your value1.00 cal

AA battery charge (2.4e+3× your value)2.39e+3 cal

Slice of bread (6.7e+4× your value)6.69e+4 cal

Daily food intake (2.0e+6× your value)2.01e+6 cal

Litre of petrol (8.2e+6× your value)8.17e+6 cal

Other Calorie (th) to Kilojoule conversions

2 cal to kJ 3 cal to kJ 4 cal to kJ 5 cal to kJ 6 cal to kJ 7 cal to kJ 8 cal to kJ

Calorie (th) to Kilojoule Conversion Table

Calorie (th) (cal)	Kilojoule (kJ)
0.5	0.002092
1	0.004184
2	0.008368
5	0.02092
10	0.04184
15	0.06276
20	0.08368
25	0.1046
50	0.2092
100	0.4184
250	1.046
500	2.092
1000	4.184

Kilojoule to Calorie (th) Conversion Table

Kilojoule (kJ)	Calorie (th) (cal)
0.5	119.502868
1	239.005736
2	478.011472
5	1,195.028681
10	2,390.057361
15	3,585.086042
20	4,780.114723
25	5,975.143403
50	11,950.286807
100	23,900.573614
250	59,751.434034
500	119,502.868069
1000	239,005.736138

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Calorie (th) (cal)

Energy

Exact conversion

The thermochemical calorie is exactly 4.184 J.

The International Table calorie (4.1868 J) and the 15 °C calorie differ slightly.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

Kilojoule (kJ)

Energy

Exact conversion

Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert Calorie (th) to Kilojoule

To convert from Calorie (th) (cal) to Kilojoule (kJ), multiply the value by 0.004184.

Formula: kJ = cal × 0.004184

Reverse: cal = kJ × 239.0057361377

Step-by-Step Example

Start with your value in Calorie (th). For example: 5 cal
Multiply by the conversion factor: 5 x 0.004184
The result is: 0.02092 kJ

About Calorie (th)

The thermochemical calorie equals 4.184 joules. Not to be confused with the food Calorie (kcal), which equals 1,000 calories.

Common uses: chemistry, nutrition, heating.

About Kilojoule

The kilojoule (kJ) is a unit of energy and work. One kilojoule equals 1000 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: energy calculations, engineering and science, education.

Frequently Asked Questions

How many Kilojoule are in 1 Calorie (th)?

There are exactly 0.004184 Kilojoule in 1 Calorie (th). This means the conversion factor from Calorie (th) to Kilojoule is 0.004184.

What is the formula to convert Calorie (th) to Kilojoule?

The formula to convert Calorie (th) to Kilojoule is: kJ = cal × 0.004184. For example, to convert 10 Calorie (th) to Kilojoule, you would multiply 10 by 0.004184.

What is a Calorie (th)?