How many horsepowers are in 1 metric horsepower?

1 metric horsepower equals 0.9863200706 horsepowers, using the exact defined conversion factor rather than an estimate.

How do I convert metric horsepower to horsepower?

Multiply the metric horsepower value by 0.9863200706. The converter above does this instantly to whatever precision you set.

How do I convert horsepower back to metric horsepower?

Use the reverse factor: 1 horsepower equals 1.013869665 metric horsepowers. You can also use the swap control in the converter above to flip the direction instantly.

Is the metric horsepower to horsepower 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.

Metric horsepowers to Horsepowers Converter

Q: What is a metric horsepower?

Metric horsepower (PS) measures power. Metric horsepower (PS/CV) is defined as exactly 735.49875 watts, the power to raise 75 kilograms one meter per second. It is classified as a Non-SI unit (metric, automotive).

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 Metric horsepowers to Horsepowers

Metric horsepower and Horsepower 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. Metric horsepower is typically associated with continental Europe, Japan, and other metric-system automotive markets, while Horsepower is typically associated with united States and United Kingdom (vehicle and engine specifications).

Formula

horsepowers = metric horsepowers × 0.98632007062

This factor comes from each unit's defined relationship to the category's base unit: 1 metric horsepower equals 735.49875 base units, and 1 horsepower equals 745.699871582 base units, so dividing one by the other gives the direct metric horsepower-to-horsepower factor of 0.98632007062.

Simple example

1 PS × 0.9863200706 = 0.9863200706 hp

1 metric horsepower = 0.9863200706 horsepowers.

Real-world example

100 PS × 0.9863200706 = 98.63200706 hp

100 metric horsepowers = 98.63200706 horsepowers.

Conversion table

Metric horsepower (PS)	Horsepower (hp)
1 PS	0.9863200706 hp
10 PS	9.863200706 hp
50 PS	49.31600353 hp
100 PS	98.63200706 hp
500 PS	493.1600353 hp
1,000 PS	986.3200706 hp

Reverse conversion: Horsepower to Metric horsepower

0.9863200706 hp × 1.013869665 = 1 PS

0.9863200706 horsepowers = 1 metric horsepowers.

metric horsepowers = horsepowers × 1.01386966542

For a page dedicated to this direction, see Horsepower to Metric horsepower.

Metric horsepower vs. Horsepower

Aspect	Metric horsepower	Horsepower
Family	Non-SI unit (metric, automotive)	US/imperial customary unit
Typical use	European and Japanese vehicle engine power ratings (often shown as PS or CV)	US and UK vehicle engine power ratings
Where it's used	Continental Europe, Japan, and other metric-system automotive markets	United States and United Kingdom (vehicle and engine specifications)

Understanding the Metric horsepower

Metric horsepower (PS) measures power. Metric horsepower (PS/CV) is defined as exactly 735.49875 watts, the power to raise 75 kilograms one meter per second. It is classified as a Non-SI unit (metric, automotive).

Where it's used: Continental Europe, Japan, and other metric-system automotive markets

Uses of the Metric horsepower today

European and Japanese vehicle engine power ratings (often shown as PS or CV)
Motor and machinery power specifications in metric countries

History of the Metric horsepower

Metric horsepower emerged in continental Europe in the 19th century as engineers sought a metric-system analog to Watt's English horsepower, defining it via a round figure (75 kgf·m/s) convenient in metric calculations. It remains the standard automotive power unit across much of Europe and Asia, labeled PS (German 'Pferdestärke') or CV (French/Italian 'cheval-vapeur').

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

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.

Metric horsepower — sources

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

Horsepower — sources

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

Metric horsepowers to Horsepowers Converter — PS to hp

Engineering Converter