Kilojoule/Hour to Calorie/Second Converter

Power Converter

22 units available

Decimals:

From

To

0.06639

1 kJ/h = 0.06639 cal/s

Formula:

cal/s = kJ/h × 0.0663904823

With your value: 1 kJ/h = 0.06639048 cal/s

How big is that?

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

Your value1.00 kJ/h

LED bulb (32× your value)32.4 kJ/h

Laptop (2.3e+2× your value)234 kJ/h

Microwave oven (3.6e+3× your value)3.60e+3 kJ/h

Electric kettle (1.1e+4× your value)1.08e+4 kJ/h

Family car engine (3.2e+5× your value)3.24e+5 kJ/h

Other Kilojoule/Hour to Calorie/Second conversions

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

Kilojoule/Hour to Calorie/Second Conversion Table

Kilojoule/Hour (kJ/h)	Calorie/Second (cal/s)
0.5	0.033195
1	0.06639
2	0.132781
5	0.331952
10	0.663905
15	0.995857
20	1.32781
25	1.659762
50	3.319524
100	6.639048
250	16.597621
500	33.195241
1000	66.390482

Calorie/Second to Kilojoule/Hour Conversion Table

Calorie/Second (cal/s)	Kilojoule/Hour (kJ/h)
0.5	7.5312
1	15.0624
2	30.1248
5	75.312
10	150.624
15	225.936
20	301.248
25	376.56
50	753.12
100	1,506.24
250	3,765.6
500	7,531.2
1000	15,062.4

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.

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

Calorie/Second (cal/s)

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 Kilojoule/Hour to Calorie/Second

To convert from Kilojoule/Hour (kJ/h) to Calorie/Second (cal/s), multiply the value by 0.0663904823.

Formula: cal/s = kJ/h × 0.0663904823

Reverse: kJ/h = cal/s × 15.0624

Step-by-Step Example

Start with your value in Kilojoule/Hour. For example: 5 kJ/h
Multiply by the conversion factor: 5 x 0.0663904823
The result is: 0.331952 cal/s

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.

About Calorie/Second

The calorie/second (cal/s) is a unit of power. One calorie/second equals 4.184 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 Calorie/Second are in 1 Kilojoule/Hour?

There are exactly 0.0663904823 Calorie/Second in 1 Kilojoule/Hour. This means the conversion factor from Kilojoule/Hour to Calorie/Second is 0.0663904823.

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

The formula to convert Kilojoule/Hour to Calorie/Second is: cal/s = kJ/h × 0.0663904823. For example, to convert 10 Kilojoule/Hour to Calorie/Second, you would multiply 10 by 0.0663904823.

What is a Kilojoule/Hour?