Calorie/Second to Kilocalorie/Hour Converter

Power Converter

22 units available

Decimals:

From

To

3.6

1 cal/s = 3.6 kcal/h

Formula:

kcal/h = cal/s × 3.6000000007

With your value: 1 cal/s = 3.6 kcal/h

How big is that?

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

Your value1.00 cal/s

LED bulb (2.2× your value)2.15 cal/s

Laptop (16× your value)15.5 cal/s

Microwave oven (2.4e+2× your value)239 cal/s

Electric kettle (7.2e+2× your value)717 cal/s

Family car engine (2.2e+4× your value)2.15e+4 cal/s

Other Calorie/Second to Kilocalorie/Hour conversions

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

Calorie/Second to Kilocalorie/Hour Conversion Table

Calorie/Second (cal/s)	Kilocalorie/Hour (kcal/h)
0.5	1.8
1	3.6
2	7.2
5	18
10	36
15	54
20	72
25	90
50	180
100	360
250	900
500	1,800
1000	3,600.000001

Kilocalorie/Hour to Calorie/Second Conversion Table

Kilocalorie/Hour (kcal/h)	Calorie/Second (cal/s)
0.5	0.138889
1	0.277778
2	0.555556
5	1.388889
10	2.777778
15	4.166667
20	5.555556
25	6.944444
50	13.888889
100	27.777778
250	69.444444
500	138.888889
1000	277.777778

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/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

Kilocalorie/Hour (kcal/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/Second to Kilocalorie/Hour

To convert from Calorie/Second (cal/s) to Kilocalorie/Hour (kcal/h), multiply the value by 3.6000000007.

Formula: kcal/h = cal/s × 3.6000000007

Reverse: cal/s = kcal/h × 0.2777777777

Step-by-Step Example

Start with your value in Calorie/Second. For example: 5 cal/s
Multiply by the conversion factor: 5 x 3.6000000007
The result is: 18 kcal/h

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.

About Kilocalorie/Hour

The kilocalorie/hour (kcal/h) is a unit of power. One kilocalorie/hour equals 1.162222222 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 Kilocalorie/Hour are in 1 Calorie/Second?

There are exactly 3.6000000007 Kilocalorie/Hour in 1 Calorie/Second. This means the conversion factor from Calorie/Second to Kilocalorie/Hour is 3.6000000007.

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

The formula to convert Calorie/Second to Kilocalorie/Hour is: kcal/h = cal/s × 3.6000000007. For example, to convert 10 Calorie/Second to Kilocalorie/Hour, you would multiply 10 by 3.6000000007.

What is a Calorie/Second?