How many centiwatts are in 1 horsepower?

1 horsepower equals 74,569.98716 centiwatts, using the exact defined conversion factor rather than an estimate.

How do I convert horsepower to centiwatt?

Multiply the horsepower value by 74569.98716. The converter above does this instantly to whatever precision you set.

How do I convert centiwatt back to horsepower?

Use the reverse factor: 1 centiwatt equals 0.0000134102 horsepowers. You can also use the swap control in the converter above to flip the direction instantly.

Centiwatt (cW) is a unit of engineering.

Is the horsepower to centiwatt conversion exact?

Yes. Mechanical horsepower is defined as exactly 745.6998715822702 watts. That fixed definition is what the converter above uses, so any rounding you see is a display choice, not a limitation of the math.

Horsepowers to Centiwatts Converter

Q: What is a horsepower?

Horsepower (hp) measures power. Mechanical horsepower is defined as exactly 745.6998715822702 watts. It is classified as a US/imperial customary unit.

About Converting Horsepowers to Centiwatts

Horsepower and Centiwatt both measure a quantity used in structural or mechanical engineering — commonly stress, pressure, force, torque, power, or energy — where converting between the unit conventions used in different regions, industries, or equipment specifications is a routine part of design work. Horsepower is most often used for us and uk vehicle engine power ratings.

Formula

centiwatts = horsepowers × 74569.9871582

This factor comes from each unit's defined relationship to the category's base unit: 1 horsepower equals 745.699871582 base units, and 1 centiwatt equals 0.01 base units, so dividing one by the other gives the direct horsepower-to-centiwatt factor of 74569.9871582.

Simple example

1 hp × 74569.98716 = 74,569.98716 cW

1 horsepower = 74,569.98716 centiwatts.

Real-world example

100 hp × 74569.98716 = 7,456,998.716 cW

100 horsepowers = 7,456,998.716 centiwatts.

Conversion table

Horsepower (hp)	Centiwatt (cW)
1 hp	74,569.98716 cW
10 hp	745,699.8716 cW
50 hp	3,728,499.358 cW
100 hp	7,456,998.716 cW
500 hp	37,284,993.58 cW
1,000 hp	74,569,987.16 cW

Reverse conversion: Centiwatt to Horsepower

1 cW × 0.0000134102209 = 0.0000134102 hp

1 centiwatt = 0.0000134102 horsepowers.

horsepowers = centiwatts × 0.000013410220896

For a page dedicated to this direction, see Centiwatt to Horsepower.

Understanding the Horsepower

Horsepower (hp) measures power. Mechanical horsepower is defined as exactly 745.6998715822702 watts. It is classified as a US/imperial customary unit.

Where it's used: United States and United Kingdom (vehicle and engine specifications)

Mechanical horsepower vs. metric horsepower. Mechanical horsepower (745.7 W) and metric horsepower/PS (735.5 W) differ by about 1.4% — a US car spec sheet in 'hp' and a European one in 'PS' are not directly comparable numbers without conversion.

Uses of the Horsepower today

US and UK vehicle engine power ratings
Motor and engine specifications in English-speaking markets

History of the Horsepower

James Watt popularized horsepower in the 1780s as a marketing figure, comparing his steam engines' output to the working capacity of a horse (based on his estimate of a horse turning a mill), so buyers could grasp engine capability in familiar terms. The unit stuck long after its origin as a sales tool, eventually being formally defined at exactly 550 foot-pounds per second.

Historical origin. Horsepower was not the invention of a single named person; it developed through the process described above.

Understanding the Centiwatt (cW)

Centiwatt is 0.01 watt units.

Horsepower — sources

NIST Special Publication 811 — Documents the exact watt-equivalence of mechanical horsepower.

Horsepowers to Centiwatts Converter — hp to cW

Engineering Converter