Kilocalorie/Hour to Calorie/Second Converter

Power Converter

22 units available

Decimals:

From

To

0.277778

1 kcal/h = 0.277778 cal/s

Formula:

cal/s = kcal/h × 0.2777777777

With your value: 1 kcal/h = 0.27777778 cal/s

How big is that?

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

Your value1.00 kcal/h

LED bulb (7.7× your value)7.74 kcal/h

Laptop (56× your value)55.9 kcal/h

Microwave oven (8.6e+2× your value)860 kcal/h

Electric kettle (2.6e+3× your value)2.58e+3 kcal/h

Family car engine (7.7e+4× your value)7.74e+4 kcal/h

Other Kilocalorie/Hour to Calorie/Second conversions

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

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

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

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.

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

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 Kilocalorie/Hour to Calorie/Second

To convert from Kilocalorie/Hour (kcal/h) to Calorie/Second (cal/s), multiply the value by 0.2777777777.

Formula: cal/s = kcal/h × 0.2777777777

Reverse: kcal/h = cal/s × 3.6000000007

Step-by-Step Example

Start with your value in Kilocalorie/Hour. For example: 5 kcal/h
Multiply by the conversion factor: 5 x 0.2777777777
The result is: 1.388889 cal/s

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.

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 Kilocalorie/Hour?

There are exactly 0.2777777777 Calorie/Second in 1 Kilocalorie/Hour. This means the conversion factor from Kilocalorie/Hour to Calorie/Second is 0.2777777777.

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

The formula to convert Kilocalorie/Hour to Calorie/Second is: cal/s = kcal/h × 0.2777777777. For example, to convert 10 Kilocalorie/Hour to Calorie/Second, you would multiply 10 by 0.2777777777.

What is a Kilocalorie/Hour?