Calorie/Second to Joule/Second Converter

Power Converter

22 units available

Decimals:

From

To

4.184

1 cal/s = 4.184 J/s

Formula:

J/s = cal/s × 4.184

With your value: 1 cal/s = 4.184 J/s

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 Joule/Second conversions

2 cal/s to J/s 3 cal/s to J/s 4 cal/s to J/s 5 cal/s to J/s 6 cal/s to J/s 7 cal/s to J/s 8 cal/s to J/s

Calorie/Second to Joule/Second Conversion Table

Calorie/Second (cal/s)	Joule/Second (J/s)
0.5	2.092
1	4.184
2	8.368
5	20.92
10	41.84
15	62.76
20	83.68
25	104.6
50	209.2
100	418.4
250	1,046
500	2,092
1000	4,184

Joule/Second to Calorie/Second Conversion Table

Joule/Second (J/s)	Calorie/Second (cal/s)
0.5	0.119503
1	0.239006
2	0.478011
5	1.195029
10	2.390057
15	3.585086
20	4.780115
25	5.975143
50	11.950287
100	23.900574
250	59.751434
500	119.502868
1000	239.005736

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

Joule/Second (J/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 Calorie/Second to Joule/Second

To convert from Calorie/Second (cal/s) to Joule/Second (J/s), multiply the value by 4.184.

Formula: J/s = cal/s × 4.184

Reverse: cal/s = J/s × 0.2390057361

Step-by-Step Example

Start with your value in Calorie/Second. For example: 5 cal/s
Multiply by the conversion factor: 5 x 4.184
The result is: 20.92 J/s

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 Joule/Second

The joule/second (J/s) is a unit of power. One joule/second equals 1 watt. 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 Joule/Second are in 1 Calorie/Second?

There are exactly 4.184 Joule/Second in 1 Calorie/Second. This means the conversion factor from Calorie/Second to Joule/Second is 4.184.

What is the formula to convert Calorie/Second to Joule/Second?

The formula to convert Calorie/Second to Joule/Second is: J/s = cal/s × 4.184. For example, to convert 10 Calorie/Second to Joule/Second, you would multiply 10 by 4.184.

What is a Calorie/Second?