Watt to Horsepower (Boiler) Converter

Power Converter

22 units available

Decimals:

From

To

0.000102

1 W = 0.000102 hp (S)

Formula:

hp (S) = W × 0.000101942

With your value: 1 W = 0.00010194 hp (S)

How big is that?

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

Your value1.00 W

LED bulb (9.0× your value)9.00 W

Laptop (65× your value)65.0 W

Microwave oven (1.0e+3× your value)1.00e+3 W

Electric kettle (3.0e+3× your value)3.00e+3 W

Family car engine (9.0e+4× your value)9.00e+4 W

Other Watt to Horsepower (Boiler) conversions

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

Watt to Horsepower (Boiler) Conversion Table

Watt (W)	Horsepower (Boiler) (hp (S))
0.5	5.097100e-5
1	0.000102
2	0.000204
5	0.00051
10	0.001019
15	0.001529
20	0.002039
25	0.002549
50	0.005097
100	0.010194
250	0.025485
500	0.050971
1000	0.101942

Horsepower (Boiler) to Watt Conversion Table

Horsepower (Boiler) (hp (S))	Watt (W)
0.5	4,904.75
1	9,809.5
2	19,619
5	49,047.5
10	98,095
15	147,142.5
20	196,190
25	245,237.5
50	490,475
100	980,950
250	2,452,375
500	4,904,750
1000	9,809,500

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.

Watt (W)

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 Watt to Horsepower (Boiler)

To convert from Watt (W) to Horsepower (Boiler) (hp (S)), multiply the value by 0.000101942.

Formula: hp (S) = W × 0.000101942

Reverse: W = hp (S) × 9,809.5

Step-by-Step Example

Start with your value in Watt. For example: 5 W
Multiply by the conversion factor: 5 x 0.000101942
The result is: 0.00051 hp (S)

About Watt

The watt (W) is a unit of power. One watt 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.

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 Watt?

There are exactly 0.000101942 Horsepower (Boiler) in 1 Watt. This means the conversion factor from Watt to Horsepower (Boiler) is 0.000101942.

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

The formula to convert Watt to Horsepower (Boiler) is: hp (S) = W × 0.000101942. For example, to convert 10 Watt to Horsepower (Boiler), you would multiply 10 by 0.000101942.

What is a Watt?