Calorie/Second to Horsepower (Boiler) Converter

Power Converter

22 units available

Decimals:

From

To

0.000427

1 cal/s = 0.000427 hp (S)

Formula:

hp (S) = cal/s × 0.0004265253

With your value: 1 cal/s = 0.00042653 hp (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 Horsepower (Boiler) conversions

2 cal/s to hp (S)3 cal/s to hp (S)4 cal/s to hp (S)5 cal/s to hp (S)6 cal/s to hp (S)7 cal/s to hp (S)8 cal/s to hp (S)

Calorie/Second to Horsepower (Boiler) Conversion Table

Calorie/Second (cal/s)	Horsepower (Boiler) (hp (S))
0.5	0.000213
1	0.000427
2	0.000853
5	0.002133
10	0.004265
15	0.006398
20	0.008531
25	0.010663
50	0.021326
100	0.042653
250	0.106631
500	0.213263
1000	0.426525

Horsepower (Boiler) to Calorie/Second Conversion Table

Horsepower (Boiler) (hp (S))	Calorie/Second (cal/s)
0.5	1,172.263384
1	2,344.526769
2	4,689.053537
5	11,722.633843
10	23,445.267686
15	35,167.90153
20	46,890.535373
25	58,613.169216
50	117,226.338432
100	234,452.676864
250	586,131.692161
500	1,172,263.384321
1000	2,344,526.768642

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

Horsepower (Boiler) (hp (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 Horsepower (Boiler)

To convert from Calorie/Second (cal/s) to Horsepower (Boiler) (hp (S)), multiply the value by 0.0004265253.

Formula: hp (S) = cal/s × 0.0004265253

Reverse: cal/s = hp (S) × 2,344.5267686424

Step-by-Step Example

Start with your value in Calorie/Second. For example: 5 cal/s
Multiply by the conversion factor: 5 x 0.0004265253
The result is: 0.002133 hp (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 Horsepower (Boiler)

The horsepower (boiler) (hp (S)) is a unit of power. One horsepower (boiler) equals 9809.5 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 Horsepower (Boiler) are in 1 Calorie/Second?

There are exactly 0.0004265253 Horsepower (Boiler) in 1 Calorie/Second. This means the conversion factor from Calorie/Second to Horsepower (Boiler) is 0.0004265253.

What is the formula to convert Calorie/Second to Horsepower (Boiler)?

The formula to convert Calorie/Second to Horsepower (Boiler) is: hp (S) = cal/s × 0.0004265253. For example, to convert 10 Calorie/Second to Horsepower (Boiler), you would multiply 10 by 0.0004265253.

What is a Calorie/Second?