Watts to Metric Horsepower (PS) Converter

Convert between watts (W) and metric horsepower (PS/Pferdestärke) using the standard: 1 W = 0.0013596216 PS , ideal for European engines and machinery.

Conversion Standard:

1 Watt (W) = 0.0013596216 Metric Horsepower (PS) | 1 PS ≈ 735.49875 W

PS = W × 0.0013596216 | W = PS ÷ 0.0013596216 (≈ PS × 735.49875)

W

Example: 735.5 W × 0.0013596216 ≈ 1 PS

PS

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About Watts and Metric Horsepower (PS)

Watts (SI unit) and Metric Horsepower (PS) – key power units for global engineering, with PS common in Europe.

Watt (W)

  • SI (International System) base unit of power
  • Defined as 1 joule of energy per second (1 W = 1 J/s)
  • Global standard for all power types (electric, mechanical, thermal)
  • Household use: 5-15W (LED bulbs), 1500W (electric heaters)

Metric Horsepower (PS/Pferdestärke)

  • European standard for engine/machinery power (1 PS = 735.49875 W)
  • Calculated as: 1 PS = 0.73549875 kW = 75 kgf·m/s (metric definition)
  • Common in EU, Japan, South Korea for car, motorcycle, and tractor specs
  • Conversion to W: 1 W = 0.0013596216 PS (core calculation standard)

Common Power Ratings (Metric Standard)

Practical examples using 1 W = 0.0013596216 PS:

Device/Object Watts (W) Metric Horsepower (PS)
Electric drill 500-1000 W 0.68-1.36 PS
Small car engine (EU) 73,550-110,325 W 100-150 PS
Mid-size SUV (EU) 147,100-220,650 W 200-300 PS
Lawn tractor 14,710-22,065 W 20-30 PS

Watts to Metric Horsepower (PS) Conversion Table

Precise conversions using 1 W = 0.0013596216 PS (1 PS = 735.49875 W)

Watts (W) = Metric Horsepower (PS) Typical EU Application
100 W = 0.13596 PS Small power tools
500 W = 0.67981 PS Electric lawnmowers
735.49875 W = 1 PS Base unit reference
1,000 W = 1.35962 PS Portable generators
10,000 W = 13.59622 PS Small industrial motors
73,549.875 W = 100 PS Compact car engines (EU)

Calculation standard: 1 Watt = 0.0013596216 Metric Horsepower (PS) | 1 PS = 735.49875 Watts.

Frequently Asked Questions

About watts, metric horsepower (PS), and the 1 W = 0.0013596216 PS standard

How to calculate watts to metric horsepower (PS) using 1 W = 0.0013596216 PS?

Use the direct multiplication formula (core standard):

Metric Horsepower (PS) = Watts (W) × 0.0013596216

Example: Convert 150,000 W to PS:

150,000 W × 0.0013596216 = 203.94324 PS

Reverse calculation (PS to W): Divide by 0.0013596216 (or multiply by 735.49875 for simplicity).

Why use metric horsepower (PS) instead of mechanical horsepower (hp)?

PS is dominant in Europe and parts of Asia for practical reasons:

  • Aligns with metric system (kg, meters) used in most global markets
  • Standardized in EU regulations for vehicle/machinery labeling
  • Slightly smaller than mechanical hp (1 PS ≈ 0.986 hp), making power ratings more "modest" for marketing
  • Historical legacy: Developed in Germany as "Pferdestärke" (horse strength)

1 PS = 735.49875 W, while 1 mechanical hp = 745.7 W – ~1.3% difference.

Is 1 W = 0.0013596216 PS an exact standard?

Yes – it’s derived from the official metric horsepower definition:

1 PS = 75 kilogram-force·meters per second (kgf·m/s)

1 kgf·m/s = 9.80665 W

1 PS = 75 × 9.80665 = 735.49875 W

1 W = 1 ÷ 735.49875 = 0.0013596216 PS (exact value)

This precision ensures consistency across engineering, manufacturing, and regulatory compliance.

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