Authoritative definitions of the International System of Units and SI prefixes.
Dedicated unit pair
Metric horsepower to Mechanical horsepower
Convert PS to hp instantly, then review the formula, assumptions, and rounding guidance.
Energy, work, heat & powerInstant result
Decimals
Formula result = input × 735.49875 ÷ 745.699871582. 1 PS = 0.9863 hp
Common examples
One value, several units
Watts735.4988 W
Kilowatts0.7355 kW
Megawatts0.0007 MW
Mechanical horsepower0.9863 hp
BTU per hour2,509.6259 BTU/h
Conversion table
| PS | hp |
|---|---|
| 1 PS | 0.9863 hp |
| 2 PS | 1.9726 hp |
| 5 PS | 4.9316 hp |
| 10 PS | 9.8632 hp |
| 25 PS | 24.658 hp |
| 50 PS | 49.316 hp |
| 100 PS | 98.632 hp |
Conversion chart
1 PS0.9863 hp
5 PS4.9316 hp
10 PS9.8632 hp
25 PS24.658 hp
50 PS49.316 hp
Worked example
1 mechanical horsepower is approximately 745.7 watts.
Unit definition
Metric horsepower (PS) One metric horsepower equals 735.49875 watt.
Unit history
Metric horsepower is represented here using its modern SI definition or an internationally accepted relationship to an SI base unit.
Step by step
1. Parse the value, including fractions.
2. Convert PS to watt.
3. Convert the base value to hp and apply your display precision.
Understand the result before using it
Metric horsepower to Mechanical horsepower converts a value measured in Metric horsepower (PS) into the equivalent value in Mechanical horsepower (hp). The numerical value changes because the size and definition of the selected unit changes; the underlying quantity does not.
Calculated result
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.
Formula, assumptions, and example
Formula
result = input × 735.49875 ÷ 745.699871582
Assumptions
- Metric horsepower and Mechanical horsepower represent the same power quantity.
- The input is expressed in PS; the output is expressed in hp.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 PS = 0.98632007062 hp. For another value, apply the same relationship and round only to the precision your source measurement supports.
When to use it
Good uses
- Read a PS measurement in a document that expects hp.
- Compare a metric horsepower value with a value reported in mechanical horsepower.
- Check the PS-to-hp arithmetic before copying the result into another calculation.
Limitations
Common mistakes to avoid
- Do not confuse PS with another unit that has a similar name or symbol.
- Round the output to a precision justified by the original measurement.
- Verify safety-critical, regulated, laboratory, and contractual conversions against the controlling standard.
Sources and further reading
These references explain the underlying standards or provide authoritative context. Your own contract, institution, clinician, product documentation, local code, or governing standard may be the controlling source.
Guidance on unit names, symbols, conversions, and numerical presentation.
Questions about this calculation
How do I convert Metric horsepower to Mechanical horsepower?
result = input × 735.49875 ÷ 745.699871582 Using the displayed relationship, 1 PS equals 0.98632007062 hp.
How many Mechanical horsepower are in one Metric horsepower?
One Metric horsepower is 0.98632007062 Mechanical horsepower. The displayed digits may be rounded.
Can I reverse the PS to hp conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts hp back to PS.
Is the Metric horsepower to Mechanical horsepower result exact?
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.