HP to PS Converter
Compare vehicle and equipment specs without mixing hp and PS.
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Enter a value, pick the units, and the conversion updates instantly.
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Mechanical horsepower (hp) and metric horsepower (PS) are close, but not identical. This also includes kilowatts for vehicle and equipment specs.
Conversion notes
Companion units, sanity checks, and precision notes.
What this means
100 horsepower (hp) converts to 101.39 metric horsepower (PS). The reverse check is 100 horsepower (hp), which is useful for spotting unit-entry mistakes.
Copy result
Copy a short conversion note for your own worksheet. CalcShelf does not save the input.
| Unit | Converted value | Based on |
|---|---|---|
| metric horsepower (PS) | 101.39 metric horsepower (PS) | 100 horsepower (hp) |
| watts | 74,569.99 watts | 100 horsepower (hp) |
| kilowatts | 74.57 kilowatts | 100 horsepower (hp) |
| megawatts | 0.07 megawatts | 100 horsepower (hp) |
| horsepower (hp) | 100 horsepower (hp) | 100 horsepower (hp) |
- Converted value
- 101.39 metric horsepower (PS)
- Based on
- 100 horsepower (hp)
- Converted value
- 74,569.99 watts
- Based on
- 100 horsepower (hp)
- Converted value
- 74.57 kilowatts
- Based on
- 100 horsepower (hp)
- Converted value
- 0.07 megawatts
- Based on
- 100 horsepower (hp)
- Converted value
- 100 horsepower (hp)
- Based on
- 100 horsepower (hp)
Power sizing worksheet
Use these local-only rows when the conversion feeds a motor, appliance, generator, inverter, HVAC, or equipment-capacity check instead of a one-off unit translation.
| Scenario | Watts | kW | hp | PS | BTU/hour | 8-hour energy | Use it for |
|---|---|---|---|---|---|---|---|
| Entered power | 74,569.99 | 74.57 | 100 | 101.39 | 254,443.36 | 596.56 kWh | Use this row to keep the source rating visible before comparing spec sheets, labels, or load estimates. |
| 80% available output | 59,655.99 | 59.66 | 80 | 81.11 | 203,554.69 | 477.25 kWh | Quick derating check for continuous load, inverter/generator capacity, heat, altitude, or aging equipment. |
| Add 20% sizing headroom | 89,483.98 | 89.48 | 120 | 121.66 | 305,332.03 | 715.87 kWh | Early planning line when startup surge, duty cycle, or future load growth may matter. |
| 8-hour energy use | 74,569.99 | 74.57 | 100 | 101.39 | 254,443.36 | 596.56 kWh | Shows the energy a steady load would consume over a typical work shift; actual duty cycle may be lower. |
- Watts
- 74,569.99
- kW
- 74.57
- hp
- 100
- PS
- 101.39
- BTU/hour
- 254,443.36
- 8-hour energy
- 596.56 kWh
- Use it for
- Use this row to keep the source rating visible before comparing spec sheets, labels, or load estimates.
- Watts
- 59,655.99
- kW
- 59.66
- hp
- 80
- PS
- 81.11
- BTU/hour
- 203,554.69
- 8-hour energy
- 477.25 kWh
- Use it for
- Quick derating check for continuous load, inverter/generator capacity, heat, altitude, or aging equipment.
- Watts
- 89,483.98
- kW
- 89.48
- hp
- 120
- PS
- 121.66
- BTU/hour
- 305,332.03
- 8-hour energy
- 715.87 kWh
- Use it for
- Early planning line when startup surge, duty cycle, or future load growth may matter.
- Watts
- 74,569.99
- kW
- 74.57
- hp
- 100
- PS
- 101.39
- BTU/hour
- 254,443.36
- 8-hour energy
- 596.56 kWh
- Use it for
- Shows the energy a steady load would consume over a typical work shift; actual duty cycle may be lower.
Power-rating checklist
| Check | Why |
|---|---|
| Separate power from energy | Watts, kW, hp, and BTU/hour are rates; kWh, joules, and BTU totals require a time period. |
| Continuous vs peak rating | Motors, generators, inverters, and HVAC equipment may advertise surge, peak, nominal, or continuous ratings. |
| Account for real operating conditions | Power factor, efficiency, heat, altitude, duty cycle, starting surge, and service factor can change the safe equipment choice. |
- Why
- Watts, kW, hp, and BTU/hour are rates; kWh, joules, and BTU totals require a time period.
- Why
- Motors, generators, inverters, and HVAC equipment may advertise surge, peak, nominal, or continuous ratings.
- Why
- Power factor, efficiency, heat, altitude, duty cycle, starting surge, and service factor can change the safe equipment choice.
Watch-outs
- Make sure the source and destination units are from the same measurement family.
- Do not use a quick conversion as final design approval for safety-critical systems.
- Confirm standards, tolerances, temperature, material condition, and manufacturer data where specs matter.
Rounded for quick checks. For regulated, safety-critical, or tolerance-sensitive work, verify the required precision before using the number.
Example
100 hp = about 101.39 PS.
Notes
Results are rounded for quick checks. Use official specs or calibrated tools when tolerances, compliance, or safety matter.
Use the HP to PS Converter without guessing what to do next
- Start with the example values to see what the main result looks like.
- Replace the example values with the best numbers you have right now; rough estimates are fine for a first pass.
- Change one input at a time so you can see which assumption actually moves the answer.
What the result means
The result is a quick technical check based on a standard formula or unit relationship. It helps you sanity-check a spec before deeper review.
How to use it
Use it to catch order-of-magnitude problems: a value that is wildly too high, too low, or in the wrong unit before it reaches a drawing, quote, or part list.
What can change it
Do not treat a simple calculator as engineering approval. Real equipment decisions can depend on tolerance, safety factor, code, heat, duty cycle, and manufacturer limits.
Good for
Compare vehicle horsepower specs.
Check this next
Try Power Converter, Torque and RPM to Horsepower Calculator, Torque Converter to cross-check the same decision from another angle.
Best habit
Run a conservative case and an optimistic case. The gap between them is often more useful than a single answer.
Common uses
- Compare vehicle horsepower specs.
- Convert hp to PS or kW.
- Avoid mixing mechanical and metric horsepower.
Common questions
Is the HP to PS Converter private?
CalcShelf calculators run without an account. Your entries stay in the calculator while you work; CalcShelf does not save them or place your numbers in shareable links.
How accurate is the HP to PS Converter?
It is a formula check, not stamped engineering. Tolerance, safety factor, heat, duty cycle, environment, and manufacturer limits can change real equipment choices.
What should I check after using the HP to PS Converter?
Verify units, specs, tolerances, safety factors, code requirements, and manufacturer data before choosing parts or equipment.
Which calculator should I try next?
Try Power Converter, Torque and RPM to Horsepower Calculator, Torque Converter as next checks so you can compare the same decision from another angle before acting.
Method behind the estimate
Engineering tools use standard unit relationships and simple mechanical, electrical, pressure, energy, density, or flow conversions.
Why the detail matters
For design, safety, warranty, or production work, verify against official specifications, standards, tolerances, and qualified engineering review.
No account or saved inputs
Your calculator values are for your session. CalcShelf does not require an account, save calculator entries, or add your numbers to shareable URLs.
Copy or print safely
Use any copy, print, or worksheet controls as local handoff tools for your own notes, supplier calls, lender questions, or implementation checklist. They are there to help you explain the result to a human.
Before acting
Treat the result as a decision draft, not a verdict. Recheck the source numbers, run a downside case, and verify the real-world rule, quote, label, or spec that controls the final answer.
Last reviewed: May 11, 2026. See methodology and editorial policy for formulas, assumptions, rounding, review approach, and limitations. For production, code, safety, or equipment changes, verify against official specs.