Convert 3 Calorie/Second (cal/s) to Kilojoule/Hour (kJ/h).

3 Calorie/Second equals 45.1872 Kilojoule/Hour. Multiply 3 by 15.0624.

3 Calorie/Second = 45.1872 Kilojoule/Hour

Worked example: converting Calorie/Second to Kilojoule/Hour

Step 1 — start with the formula. kJ/h = cal/s × 15.0624
Step 2 — substitute your figure. 3 cal/s × 15.0624
Step 3 — read the result. 3 cal/s = 45.1872 kJ/h
Step 4 — check it in reverse. cal/s = kJ/h × 0.0663904823 returns 3 cal/s, which matches the figure you started with.

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45.1872

3 cal/s = 45.1872 kJ/h

Formula:

kJ/h = cal/s × 15.0624

With your value: 3 cal/s = 45.1872 kJ/h

How big is that?

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

LED bulb (1/1.4 your value)2.15 cal/s

Your value3.00 cal/s

Laptop (5.2× your value)15.5 cal/s

Microwave oven (80× your value)239 cal/s

Electric kettle (2.4e+2× your value)717 cal/s

Family car engine (7.2e+3× your value)2.15e+4 cal/s

Other Calorie/Second to Kilojoule/Hour conversions

1 cal/s to kJ/h 2 cal/s to kJ/h 4 cal/s to kJ/h 5 cal/s to kJ/h 6 cal/s to kJ/h 7 cal/s to kJ/h 8 cal/s to kJ/h Full Calorie/Second to Kilojoule/Hour converter

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

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

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

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/Second to Kilojoule/Hour

To convert from Calorie/Second (cal/s) to Kilojoule/Hour (kJ/h), multiply the value by 15.0624.

Formula: kJ/h = cal/s × 15.0624

Reverse: cal/s = kJ/h × 0.0663904823

Step-by-Step Example

Start with your value in Calorie/Second. For example: 5 cal/s
Multiply by the conversion factor: 5 x 15.0624
The result is: 75.312 kJ/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 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

What is 3 Calorie/Second in Kilojoule/Hour?

3 Calorie/Second equals 45.1872 Kilojoule/Hour.

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

There are exactly 15.0624 Kilojoule/Hour in 1 Calorie/Second. This means the conversion factor from Calorie/Second to Kilojoule/Hour is 15.0624.

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

The formula to convert Calorie/Second to Kilojoule/Hour is: kJ/h = cal/s × 15.0624. For example, to convert 10 Calorie/Second to Kilojoule/Hour, you would multiply 10 by 15.0624.

What is a Calorie/Second?