Imperial Horsepower (hp) to Metric Horsepower (PS) Conversion

Imperial horsepower (hp) to metric horsepower (PS) conversion is a common power unit conversion in automotive engineering and mechanical equipment fields. Imperial horsepower is mainly used for automotive and mechanical equipment marking in North America, while metric horsepower is widely used in Europe, Asia and other regions. This conversion is of great significance in international automotive trade, engine technology exchange and mechanical equipment selection.

This tool provides professional hp to PS conversion functions, supporting high-precision calculations and real-time conversion, suitable for the professional needs of automotive engineers, mechanical designers and equipment procurement personnel.

Conversion Formula

The conversion between imperial horsepower (hp) and metric horsepower (PS) is based on their different definitions:

Basic Formula:

• 1 hp = 745.7 watts
• 1 PS = 735.5 watts
• 1 hp = 1.01387 PS
• 1 PS = 0.98632 hp

Conversion Formulas:

• Imperial to Metric: PS = hp × 1.01387
• Metric to Imperial: hp = PS ÷ 1.01387

Application Examples

Automotive Industry

• American Cars: Ford Mustang GT 5.0L V8 engine produces 450 hp, equivalent to 456.2 PS
• European Cars: BMW M3 engine produces 480 PS, equivalent to 473.4 hp
• Japanese Cars: Honda Civic Type R engine produces 320 PS, equivalent to 315.6 hp

Marine Engines

• Outboard Motors: Mercury 300 hp outboard motor equals 304.2 PS
• Yacht Engines: Caterpillar C32 marine engine 1,925 hp equals 1,951.7 PS
• Commercial Vessels: Large ship engines often exceed 10,000 hp (10,138.7 PS)

Industrial Equipment

• Agricultural Machinery: John Deere 9620R tractor 620 hp equals 628.6 PS
• Construction Equipment: Caterpillar 797F mining truck 4,000 hp equals 4,055.5 PS
• Power Generation: Industrial generators rated in hp need PS conversion for international markets

Usage Recommendations

1. Automotive Engineering: Use PS for European markets, hp for North American markets
2. International Trade: Always provide both units in specifications
3. Technical Documentation: Include conversion factors in engineering drawings
4. Equipment Selection: Consider regional standards when specifying power requirements
5. Performance Comparison: Use consistent units when comparing different engines

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