Calorie/Hour to Kilojoule/Hour Converter

Power Converter

22 units available

Decimals:

From

To

0.004184

1 cal/h = 0.004184 kJ/h

Formula:

kJ/h = cal/h × 0.004184

With your value: 1 cal/h = 0.004184 kJ/h

How big is that?

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

Your value1.00 cal/h

LED bulb (7.7e+3× your value)7.74e+3 cal/h

Laptop (5.6e+4× your value)5.59e+4 cal/h

Microwave oven (8.6e+5× your value)8.60e+5 cal/h

Electric kettle (2.6e+6× your value)2.58e+6 cal/h

Family car engine (7.7e+7× your value)7.74e+7 cal/h

Other Calorie/Hour to Kilojoule/Hour conversions

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

Calorie/Hour to Kilojoule/Hour Conversion Table

Calorie/Hour (cal/h)	Kilojoule/Hour (kJ/h)
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/Hour to Calorie/Hour Conversion Table

Kilojoule/Hour (kJ/h)	Calorie/Hour (cal/h)
0.5	119.502868
1	239.005736
2	478.011472
5	1,195.028681
10	2,390.057362
15	3,585.086043
20	4,780.114724
25	5,975.143405
50	11,950.286809
100	23,900.573618
250	59,751.434046
500	119,502.868092
1000	239,005.736183

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/Hour (cal/h)

Power

Exact conversion

Derived from the watt (1 W = 1 J/s).

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/Hour (kJ/h)

Power

Exact conversion

Derived from the watt (1 W = 1 J/s).

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/Hour to Kilojoule/Hour

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

Formula: kJ/h = cal/h × 0.004184

Reverse: cal/h = kJ/h × 239.0057361834

Step-by-Step Example

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

About Calorie/Hour

The calorie/hour (cal/h) is a unit of power. One calorie/hour equals 0.001162222222 watts. UnitConvertLab converts it against every other power unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

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

About Kilojoule/Hour

The kilojoule/hour (kJ/h) is a unit of power. One kilojoule/hour equals 0.2777777778 watts. UnitConvertLab converts it against every other power unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

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

Frequently Asked Questions

How many Kilojoule/Hour are in 1 Calorie/Hour?

There are exactly 0.004184 Kilojoule/Hour in 1 Calorie/Hour. This means the conversion factor from Calorie/Hour to Kilojoule/Hour is 0.004184.

What is the formula to convert Calorie/Hour to Kilojoule/Hour?

The formula to convert Calorie/Hour to Kilojoule/Hour is: kJ/h = cal/h × 0.004184. For example, to convert 10 Calorie/Hour to Kilojoule/Hour, you would multiply 10 by 0.004184.

What is a Calorie/Hour?