Horsepower (Boiler) to Horsepower (Mech) Converter

Power Converter

22 units available

Decimals:

From

To

13.154756

1 hp (S) = 13.154756 hp

Formula:

hp = hp (S) × 13.1547561879

With your value: 1 hp (S) = 13.15475619 hp

How big is that?

Everyday references on a logarithmic scale, all expressed in horsepower (boiler) so you can sanity-check the result.

LED bulb (1/1.1e+3 your value)0.000917 hp (S)

Laptop (1/1.5e+2 your value)0.00663 hp (S)

Microwave oven (1/9.8 your value)0.102 hp (S)

Electric kettle (1/3.3 your value)0.306 hp (S)

Your value1.00 hp (S)

Family car engine (9.2× your value)9.17 hp (S)

Other Horsepower (Boiler) to Horsepower (Mech) conversions

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

Horsepower (Boiler) to Horsepower (Mech) Conversion Table

Horsepower (Boiler) (hp (S))	Horsepower (Mech) (hp)
0.5	6.577378
1	13.154756
2	26.309512
5	65.773781
10	131.547562
15	197.321343
20	263.095124
25	328.868905
50	657.737809
100	1,315.475619
250	3,288.689047
500	6,577.378094
1000	13,154.756188

Horsepower (Mech) to Horsepower (Boiler) Conversion Table

Horsepower (Mech) (hp)	Horsepower (Boiler) (hp (S))
0.5	0.038009
1	0.076018
2	0.152036
5	0.380091
10	0.760181
15	1.140272
20	1.520363
25	1.900453
50	3.800907
100	7.601813
250	19.004533
500	38.009066
1000	76.018133

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.

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

Horsepower (Mech) (hp)

Power

Exact conversion

Mechanical horsepower is exactly 550 ft·lbf/s = 745.699 871 582 270 22 W.

Metric horsepower (PS) is 735.498 75 W — about 1.4 % lower.

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 Horsepower (Boiler) to Horsepower (Mech)

To convert from Horsepower (Boiler) (hp (S)) to Horsepower (Mech) (hp), multiply the value by 13.1547561879.

Formula: hp = hp (S) × 13.1547561879

Reverse: hp (S) = hp × 0.0760181326

Step-by-Step Example

Start with your value in Horsepower (Boiler). For example: 5 hp (S)
Multiply by the conversion factor: 5 x 13.1547561879
The result is: 65.773781 hp

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.

About Horsepower (Mech)

The horsepower (mech) (hp) is a unit of power. One horsepower (mech) equals 745.6998716 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 (Mech) are in 1 Horsepower (Boiler)?

There are exactly 13.1547561879 Horsepower (Mech) in 1 Horsepower (Boiler). This means the conversion factor from Horsepower (Boiler) to Horsepower (Mech) is 13.1547561879.

What is the formula to convert Horsepower (Boiler) to Horsepower (Mech)?

The formula to convert Horsepower (Boiler) to Horsepower (Mech) is: hp = hp (S) × 13.1547561879. For example, to convert 10 Horsepower (Boiler) to Horsepower (Mech), you would multiply 10 by 13.1547561879.

What is a Horsepower (Boiler)?