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Electric Horsepower to Metric Horsepower Converter

Convert hp(E) to PS with our free online power converter.

Quick Answer

1 Electric Horsepower = 1.014278 PS

Formula: Electric Horsepower × conversion factor = Metric Horsepower

Use the calculator below for instant, accurate conversions.

Our Accuracy Guarantee

All conversion formulas on UnitsConverter.io have been verified against NIST (National Institute of Standards and Technology) guidelines and international SI standards. Our calculations are accurate to 10 decimal places for standard conversions and use arbitrary precision arithmetic for astronomical units.

Last verified: February 2026Reviewed by: Sam Mathew, Software Engineer

Electric Horsepower to Metric Horsepower Calculator

How to Use the Electric Horsepower to Metric Horsepower Calculator:

  1. Enter the value you want to convert in the 'From' field (Electric Horsepower).
  2. The converted value in Metric Horsepower will appear automatically in the 'To' field.
  3. Use the dropdown menus to select different units within the Power category.
  4. Click the swap button (⇌) to reverse the conversion direction.
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How to Convert Electric Horsepower to Metric Horsepower: Step-by-Step Guide

Converting Electric Horsepower to Metric Horsepower involves multiplying the value by a specific conversion factor, as shown in the formula below.

Formula:

PS = hp(E) × 1.01428

Example Calculation:

1 hp(E) = 1.014278 PS

Disclaimer: For Reference Only

These conversion results are provided for informational purposes only. While we strive for accuracy, we make no guarantees regarding the precision of these results, especially for conversions involving extremely large or small numbers which may be subject to the inherent limitations of standard computer floating-point arithmetic.

Not for professional use. Results should be verified before use in any critical application. View our Terms of Service for more information.

Need to convert to other power units?

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📊 Power Table

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📋 Unit Symbols

Copy hp(E) & PS symbols

What is a Electric Horsepower and a Metric Horsepower?

1 hp(E) = 746 W = 0.746 kW = 1.0004 hp (mechanical) = 2,545 BTU/h

Difference from mechanical hp: 746 W vs 745.7 W (0.04% higher)

1 PS = 735.5 W = 0.7355 kW = 0.9863 hp (mechanical) = 75 kgf⋅m/s = 2,510 BTU/h

Names by region:

  • PS (Pferdestärke) - German
  • CV (Chevaux Vapeur) - French
  • pk (paardenkracht) - Dutch
  • hk (hästkraft) - Swedish
  • LE (Leistungseinheit) - Older German

All equal exactly 735.5 watts.

Note: The Electric Horsepower is part of the imperial/US customary system, primarily used in the US, UK, and Canada for everyday measurements. The Metric Horsepower belongs to the imperial/US customary system.

Common Uses and Applications: hp(E) vs PS

Explore the typical applications for both Electric Horsepower (imperial/US) and Metric Horsepower (imperial/US) to understand their common contexts.

Common Uses for hp(E)

Electric Motors: Industrial motors, pumps, compressors (ratings in hp(E)). HVAC: Fan motors, blower motors (fractional to 10 hp). Manufacturing: Conveyor motors, machine tools (1-100 hp). Residential: Garage door openers, pool pumps (0.5-3 hp).

When to Use PS

Automotive: Engine power ratings in Europe, Asia (100-500 PS typical). Motorcycles: Engine power specifications (15-200 PS). Industrial: European motors, pumps, machinery (kW now more common). Marine: European boat engines, outboards (5-500 PS).

Additional Unit Information

About Electric Horsepower (hp(E))

How do I convert electric horsepower to watts?

Formula: W = hp(E) × 746

Examples:

  • 1 hp(E) = 746 W
  • 5 hp(E) = 3,730 W = 3.73 kW
  • 10 hp(E) = 7,460 W = 7.46 kW
  • 0.5 hp(E) = 373 W

Electric HP to Watts converter →

What is the difference between electric and mechanical horsepower?

Electric HP (hp(E)): 746 W exactly (US electric motors) Mechanical HP (hp): 745.7 W (550 ft⋅lb/s, automotive standard)

Difference: 0.04% (practically identical)

Usage:

  • Electric motors → hp(E)
  • Engines (gas, diesel) → mechanical hp
  • International → kW preferred

Conversion: 1 hp(E) = 1.0004 hp (mechanical)

How much power does a 1 hp electric motor use?

Full load: 746 W input (if 100% efficient)

Realistic power draw (accounting for efficiency):

  • 50% efficiency: 1,492 W (1.5 kW)
  • 70% efficiency: 1,066 W (1.07 kW)
  • 85% efficiency: 878 W (0.88 kW)
  • 90% efficiency: 829 W (0.83 kW)

Example: 1 hp motor at 85% efficiency draws 878W. Running 8 hours = 7 kWh energy consumed.

Modern motors: 85-95% efficient. Older motors: 70-85%.

Why use hp(E) instead of kW?

US tradition: Motor industry established before SI metric adoption

Current practice:

  • US: Both hp(E) and kW used (hp(E) more common for small motors)
  • Europe/Asia: Primarily kW
  • International standards: Moving toward kW only

Nameplate labeling: Many US motors show both (e.g., "1 hp / 0.75 kW")

Conversion: Divide hp(E) by 1.341 to get kW

How do I size a motor for my application?

Basic formula: Required hp = (Torque × RPM) ÷ 5,252

Practical approach:

  1. Determine load requirements (torque, speed, duty cycle)
  2. Add safety factor: Multiply by 1.15-1.25 (15-25% margin)
  3. Select next standard size: 1/4, 1/3, 1/2, 3/4, 1, 1.5, 2, 3, 5, 7.5, 10 hp

Example: Application needs 0.8 hp → Add 25% = 1 hp → Select 1 hp motor

Avoid oversizing: Wastes energy, motors run inefficiently at low load.

About Metric Horsepower (PS)

How do I convert PS to horsepower (hp)?

Formula: hp = PS × 0.9863 (or PS ÷ 1.014)

Examples:

  • 100 PS = 98.6 hp
  • 150 PS = 148 hp
  • 200 PS = 197 hp
  • 300 PS = 296 hp

Reverse: hp × 1.014 = PS

PS to HP converter →

How do I convert PS to kilowatts?

Formula: kW = PS × 0.7355 (or PS ÷ 1.36)

Examples:

  • 75 PS = 55.2 kW
  • 100 PS = 73.6 kW
  • 150 PS = 110.3 kW
  • 200 PS = 147.1 kW

Quick approximation: Divide PS by 1.36 to get kW

PS to kW converter →

What is the difference between PS and hp?

Metric HP (PS): 735.5 W (75 kgf⋅m/s, Europe/Asia) Mechanical HP (hp): 745.7 W (550 ft⋅lb/s, US/UK)

Difference: PS is 1.4% less than hp

Conversion: 1 PS = 0.9863 hp, 1 hp = 1.014 PS

Example:

  • BMW 330i: 258 PS = 254 hp = 190 kW
  • Ford Mustang: 450 hp = 456 PS = 336 kW

Modern trend: Manufacturers increasingly list all three (PS, hp, kW)

Why does Europe use PS instead of hp?

Historical: Metric system adoption in Continental Europe

Definition basis:

  • PS based on metric units (75 kg lifted 1 m in 1 s)
  • hp based on imperial units (550 lb lifted 1 ft in 1 s)

Current practice:

  • Official: kW is legal unit (EU regulations)
  • Marketing: PS still widely used in car advertising
  • Dual listing: Most specs show "kW (PS)" format

Example spec: "110 kW (150 PS)" on European car brochures

How do I compare engine specs in different units?

Three common formats:

  1. US/Canada: hp (horsepower mechanical)
  2. Europe/Asia: PS (metric horsepower)
  3. International: kW (kilowatts)

Quick comparison table:

| hp | PS | kW | |-----|-----|-----| | 100 | 101 | 75 | | 150 | 152 | 112 | | 200 | 203 | 149 | | 300 | 304 | 224 |

Conversion shortcuts:

  • hp ≈ PS (within 1-2%)
  • kW × 1.36 ≈ PS
  • hp × 0.746 ≈ kW

Example: Car rated at 184 PS = 181 hp = 135 kW (all same power)

Conversion Table: Electric Horsepower to Metric Horsepower

Electric Horsepower (hp(E))Metric Horsepower (PS)
0.50.507
11.014
1.51.521
22.029
55.071
1010.143
2525.357
5050.714
100101.428
250253.569
500507.139
1,0001,014.278

People Also Ask

How do I convert Electric Horsepower to Metric Horsepower?

To convert Electric Horsepower to Metric Horsepower, enter the value in Electric Horsepower in the calculator above. The conversion will happen automatically. Use our free online converter for instant and accurate results. You can also visit our power converter page to convert between other units in this category.

Learn more →

What is the conversion factor from Electric Horsepower to Metric Horsepower?

The conversion factor depends on the specific relationship between Electric Horsepower and Metric Horsepower. You can find the exact conversion formula and factor on this page. Our calculator handles all calculations automatically. See the conversion table above for common values.

Can I convert Metric Horsepower back to Electric Horsepower?

Yes! You can easily convert Metric Horsepower back to Electric Horsepower by using the swap button (⇌) in the calculator above, or by visiting our Metric Horsepower to Electric Horsepower converter page. You can also explore other power conversions on our category page.

Learn more →

What are common uses for Electric Horsepower and Metric Horsepower?

Electric Horsepower and Metric Horsepower are both standard units used in power measurements. They are commonly used in various applications including engineering, construction, cooking, and scientific research. Browse our power converter for more conversion options.

For more power conversion questions, visit our FAQ page or explore our conversion guides.

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📚 How to Convert Units

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🔢 Conversion Formulas

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⚖️ Metric vs Imperial

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Verified Against Authority Standards

All conversion formulas have been verified against international standards and authoritative sources to ensure maximum accuracy and reliability.

NIST Reference on Constants, Units and Uncertainty

National Institute of Standards and Technology — Fundamental physical constants and unit conversions

BIPM SI Units

Bureau International des Poids et Mesures — International System of Units (SI) definitions and standards

ISO 80000

International Organization for Standardization — Quantities and units international standards series

Last verified: February 19, 2026