How do I convert horsepower to watts?

To convert mechanical horsepower to watts, multiply by 745.6999. For example, 1 hp × 745.7 = 745.7 W. For metric horsepower (PS), multiply by 735.4988. For electrical horsepower, multiply by 746.

What is the formula for horsepower to watts?

Watts = mechanical hp × 745.6999. Watts = metric hp (PS) × 735.4988. Watts = electrical hp × 746. Watts = boiler hp × 9,809.5. This converter uses mechanical horsepower.

How many watts is 1 horsepower?

1 mechanical hp = 745.6999 W (often rounded to 746 W). 1 metric hp (PS) = 735.4988 W. 1 electrical hp = 746 W. The difference between types is about 1.4% between mechanical and metric.

How many horsepower is 1 kilowatt?

1 kW = 1.3410 mechanical hp = 1.3596 metric hp (PS). For quick estimation: kW × 1.34 = hp, or hp × 0.746 = kW. Example: 100 kW = 134 hp.

> >Horsepower to Watts Converter

Horsepower to Watts Converter

Convert mechanical horsepower (hp) to watts (W) with this easy-to-use power converter.

Horsepower

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External Resources

Wikipedia: Horsepower Wikipedia: Watt NIST: Metric System

Frequently Asked Questions

How do I convert horsepower to watts?: To convert mechanical horsepower to watts, multiply by 745.6999. For example, 1 hp × 745.7 = 745.7 W. For metric horsepower (PS), multiply by 735.4988. For electrical horsepower, multiply by 746.
What is the formula for horsepower to watts?: Watts = mechanical hp × 745.6999. Watts = metric hp (PS) × 735.4988. Watts = electrical hp × 746. Watts = boiler hp × 9,809.5. This converter uses mechanical horsepower.
How many watts is 1 horsepower?: 1 mechanical hp = 745.6999 W (often rounded to 746 W). 1 metric hp (PS) = 735.4988 W. 1 electrical hp = 746 W. The difference between types is about 1.4% between mechanical and metric.
How many horsepower is 1 kilowatt?: 1 kW = 1.3410 mechanical hp = 1.3596 metric hp (PS). For quick estimation: kW × 1.34 = hp, or hp × 0.746 = kW. Example: 100 kW = 134 hp.
What is the difference between hp, PS, and kW?: hp (mechanical) = 745.7 W, used in US/UK. PS (Pferdestärke) = 735.5 W, used in Europe. kW is the SI unit (1 kW = 1.341 hp). 1 hp = 1.014 PS. These are nearly equivalent in practice.
How do I convert horsepower to watts for electric motors?: Electric motor: 1 hp = 746 W (electrical hp standard). Nameplate says output hp. Input power = output / efficiency. A 1 hp motor with 85% efficiency draws 746 / 0.85 = 877 W from the supply.
What is the origin of the watt?: The watt is named after James Watt (1736-1819), the Scottish engineer who improved the steam engine. It was adopted as the SI unit of power in 1960. 1 W = 1 J/s = 1 kg·m²/s³.
How do I convert horsepower to watts in Excel?: Use =A1*745.6999 to convert mechanical hp (in A1) to watts. Or use =CONVERT(A1,"HP","W"). For metric: =A1*735.4988 or =CONVERT(A1,"PS","W"). For electrical: =A1*746.
What is the horsepower to watts conversion for 5 horsepower?: 5 hp = 3,728.5 W ≈ 3.73 kW. Common: 5 hp air compressor, 5 hp outboard motor, 5 hp lawn tractor, 5 hp garbage disposal (commercial). A 5 hp motor draws ~3.7 kW at full load.
How do I convert horsepower to watts for car engines?: Car engines: 100 hp = 74.6 kW, 150 hp = 111.9 kW, 200 hp = 149.1 kW, 300 hp = 223.7 kW, 400 hp = 298.3 kW, 500 hp = 372.8 kW. European car specs are in kW.
What is the horsepower to watts conversion for 0.5 horsepower?: 0.5 hp = 372.85 W. Common: 0.5 hp sump pump, 0.5 hp garbage disposal, 0.5 hp garage door opener, 0.5 hp furnace fan motor. Many household appliances use fractional hp motors.
How do I convert horsepower to watts for generators?: Generator engine hp vs electrical output: 5 hp engine → ~3.3 kW (due to alternator losses). Formula: kW ≈ engine hp × 0.66. A generator rated 5 kW needs about 7-8 hp engine.
What is the horsepower to watts conversion for 10 horsepower?: 10 hp = 7,457 W = 7.457 kW. Common: 10 hp air compressor (industrial), 10 hp lathe, 10 hp swimming pool pump, 10 hp diesel engine (small). A 10 hp motor draws ~8.8 kW accounting for efficiency.
How do I convert horsepower to watts for pumps?: Pump hp to kW: 0.5 hp = 0.37 kW, 1 hp = 0.75 kW, 2 hp = 1.49 kW, 3 hp = 2.24 kW, 5 hp = 3.73 kW, 10 hp = 7.46 kW. Pump curves show power at different flow rates.
What is the difference between SAE and DIN horsepower?: SAE hp (Society of Automotive Engineers) uses mechanical hp = 745.7 W. DIN hp (Deutsches Institut für Normung) uses metric PS = 735.5 W. SAE gross vs net also differ - net includes all engine accessories.
How do I convert horsepower to watts for HVAC?: HVAC: 1 hp compressor = 746 W. AC units: 1 ton = 12,000 BTU/h = 3.517 kW ≈ 4.7 hp cooling. Furnace fans: 0.5-1 hp (373-746 W). Heat pumps rated in tons or kW.
What is the horsepower to watts conversion for 2 horsepower?: 2 hp = 1,491.4 W = 1.491 kW. Common: 2 hp lawn mower, 2 hp pressure washer, 2 hp table saw, 2 hp water pump. A 2 hp motor at 240 V draws about 6.2 A (at 85% efficiency).
How do I convert horsepower to watts for tractors?: Tractors: 25 hp = 18.6 kW (compact), 50 hp = 37.3 kW (utility), 100 hp = 74.6 kW (row crop), 200 hp = 149.1 kW (large), 400 hp = 298.3 kW (articulated). PTO hp vs engine hp differ by ~10%.
What is the horsepower to watts conversion for 0.25 horsepower?: 0.25 hp = 186.4 W. Common: ¼ hp sump pump, ¼ hp condensate pump, ¼ hp small fan motor, ¼ hp aquarium pump. The smallest standard fractional hp motor size.
How do I convert horsepower to watts for industrial machines?: Industrial: conveyor 1-5 hp (0.75-3.73 kW), crusher 10-50 hp (7.5-37.3 kW), pump 5-100 hp (3.7-74.6 kW), compressor 10-200 hp (7.5-149 kW). Motors are selected based on load requirements.
What is the horsepower to watts conversion for 15 horsepower?: 15 hp = 11,185.5 W = 11.19 kW. Common: 15 hp outboard motor, 15 hp lawn tractor (zero-turn), 15 hp compressor (industrial), 15 hp irrigation pump.
How do I convert horsepower to watts for boats?: Marine engines: small outboard 2.5-15 hp (1.86-11.2 kW), mid-size 40-150 hp (29.8-112 kW), large 200-350+ hp (149-261+ kW). Propulsion power is at the propeller shaft (shaft hp).
What is the horsepower to watts conversion for 3 horsepower?: 3 hp = 2,237.1 W = 2.237 kW. Common: 3 hp air compressor (portable), 3 hp chipper/shredder, 3 hp dust collector (woodworking), 3 hp well pump (deep).
How do I convert horsepower to watts for appliances?: Appliance power: refrigerator 0.1-0.25 hp (75-186 W), washer 0.5-1 hp (373-746 W), dryer 0.5-1 hp (373-746 W), dishwasher 0.5-1 hp, vacuum 1-2 hp (746-1491 W). "Peak hp" ratings may be misleading.
What is the horsepower to watts conversion for 50 horsepower?: 50 hp = 37,285 W = 37.29 kW. Common: 50 hp tractor, 50 hp boat engine (mid-size), 50 hp industrial compressor, 50 hp electric car motor (small EV). A 50 kW motor is about 67 hp.
How do I convert hp to kW for vehicle registration?: Many countries require kW for vehicle tax/registration. Convert: kW = hp × 0.7457. Example: 150 hp × 0.7457 = 111.9 kW. Rounding: 150 hp ≈ 112 kW. Tax brackets may round to nearest kW.
What is the horsepower to watts conversion for 25 horsepower?: 25 hp = 18,642.5 W = 18.64 kW. Common: 25 hp small tractor, 25 hp generator (prime power ~20 kW), 25 hp irrigation pump, 25 hp Zero-Turn mower (commercial).
How do I convert horsepower to watts for exercise equipment?: Exercise: bicycle ergometer 0.1-0.5 hp (75-373 W), rowing machine 0.1-0.3 hp, elliptical 0.1-0.4 hp. A fit person can maintain 150-200 W (0.2-0.27 hp) for extended periods.
What is the horsepower to watts conversion for 100 horsepower?: 100 hp = 74,570 W = 74.57 kW. Common: 100 hp car engine (economy car), 100 hp boat engine, 100 hp tractor (utility), 100 hp compressor. A 100 kW motor ≈ 134 hp.
How do I convert horsepower to watts for solar?: Solar panel output: 300 W = 0.40 hp (peak), 400 W = 0.54 hp. Solar system: 5 kW = 6.7 hp, 10 kW = 13.4 hp. Inverter rating in kW or VA. Compare solar output in watts (DC) vs AC output.
What is the horsepower to watts conversion for 7.5 horsepower?: 7.5 hp = 5,592.7 W = 5.593 kW. Common: 7.5 hp air compressor (two-stage), 7.5 hp pump, 7.5 hp generator (5-6 kW output), 7.5 hp woodworking shaper.