Authoritative definitions of the International System of Units and SI prefixes.
Dedicated unit pair
Mechanical horsepower to Metric horsepower
Convert hp to PS instantly, then review the formula, assumptions, and rounding guidance.
Energy, work, heat & powerInstant result
Decimals
Formula result = input × 745.699871582 ÷ 735.49875. 1 hp = 1.0139 PS
Common examples
One value, several units
Watts745.6999 W
Kilowatts0.7457 kW
Megawatts0.0007 MW
Metric horsepower1.0139 PS
BTU per hour2,544.4336 BTU/h
Conversion table
| hp | PS |
|---|---|
| 1 hp | 1.0139 PS |
| 2 hp | 2.0277 PS |
| 5 hp | 5.0693 PS |
| 10 hp | 10.1387 PS |
| 25 hp | 25.3467 PS |
| 50 hp | 50.6935 PS |
| 100 hp | 101.387 PS |
Conversion chart
1 hp1.0139 PS
5 hp5.0693 PS
10 hp10.1387 PS
25 hp25.3467 PS
50 hp50.6935 PS
Worked example
1 mechanical horsepower is approximately 745.7 watts.
Unit definition
Mechanical horsepower (hp) One mechanical horsepower equals 745.699871582 watt.
Unit history
Mechanical 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 hp to watt.
3. Convert the base value to PS and apply your display precision.
Understand the result before using it
Mechanical horsepower to Metric horsepower converts a value measured in Mechanical horsepower (hp) into the equivalent value in Metric horsepower (PS). 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 × 745.699871582 ÷ 735.49875
Assumptions
- Mechanical horsepower and Metric horsepower represent the same power quantity.
- The input is expressed in hp; the output is expressed in PS.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 hp = 1.01386966542 PS. 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 hp measurement in a document that expects PS.
- Compare a mechanical horsepower value with a value reported in metric horsepower.
- Check the hp-to-PS arithmetic before copying the result into another calculation.
Limitations
Common mistakes to avoid
- Do not confuse hp 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 Mechanical horsepower to Metric horsepower?
result = input × 745.699871582 ÷ 735.49875 Using the displayed relationship, 1 hp equals 1.01386966542 PS.
How many Metric horsepower are in one Mechanical horsepower?
One Mechanical horsepower is 1.01386966542 Metric horsepower. The displayed digits may be rounded.
Can I reverse the hp to PS conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts PS back to hp.
Is the Mechanical horsepower to Metric 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.