How do I convert watts to horsepower?

To convert watts to mechanical horsepower (hp), divide by 745.6999. For example, 1000 W / 745.7 = 1.341 hp. For metric horsepower (PS), divide by 735.4988. For electrical horsepower, divide by 746.

What is the formula for watts to horsepower?

Mechanical hp (SAE) = watts / 745.6999. Metric hp (PS/kW) = watts / 735.4988. Electrical hp = watts / 746. Boiler hp = watts / 9,809.5. This converter uses mechanical horsepower.

How many horsepower is 1000 watts?

1000 W = 1.3410 mechanical hp ≈ 1.36 metric hp (PS). For reference: 1 kW = 1.341 hp. A typical microwave uses ~1000 W (1.34 hp). A small electric motor might be 0.5-2 hp (373-1491 W).

How many watts are in a horsepower?

1 mechanical hp = 745.6999 W ≈ 746 W. 1 metric hp (PS) = 735.4988 W. 1 electrical hp = 746 W. 1 boiler hp = 9,809.5 W (used for steam boilers). The "hp" nameplate rating is mechanical.

> >Watts to Horsepower Converter

Watts to Horsepower Converter

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

Watts

Related Tools

External Resources

Wikipedia: Watt Wikipedia: Horsepower NIST: Metric System

Frequently Asked Questions

How do I convert watts to horsepower?: To convert watts to mechanical horsepower (hp), divide by 745.6999. For example, 1000 W / 745.7 = 1.341 hp. For metric horsepower (PS), divide by 735.4988. For electrical horsepower, divide by 746.
What is the formula for watts to horsepower?: Mechanical hp (SAE) = watts / 745.6999. Metric hp (PS/kW) = watts / 735.4988. Electrical hp = watts / 746. Boiler hp = watts / 9,809.5. This converter uses mechanical horsepower.
How many horsepower is 1000 watts?: 1000 W = 1.3410 mechanical hp ≈ 1.36 metric hp (PS). For reference: 1 kW = 1.341 hp. A typical microwave uses ~1000 W (1.34 hp). A small electric motor might be 0.5-2 hp (373-1491 W).
How many watts are in a horsepower?: 1 mechanical hp = 745.6999 W ≈ 746 W. 1 metric hp (PS) = 735.4988 W. 1 electrical hp = 746 W. 1 boiler hp = 9,809.5 W (used for steam boilers). The "hp" nameplate rating is mechanical.
What is the difference between mechanical and metric horsepower?: Mechanical hp (James Watt's definition) = 550 ft·lb/s = 745.7 W. Metric PS (Pferdestärke) = 75 kgf·m/s = 735.5 W. PS is used in Europe for car engines. 1 hp = 1.014 PS. Very close in practice.
How do I convert watts to horsepower for electric motors?: Electric motor rating: input power in watts, output power in hp. Motor efficiency (~85-95%) reduces actual output. Formula: hp = (volts × amps × efficiency) / 746. A 1 hp motor draws ~746 W input.
What is the history of horsepower?: James Watt defined horsepower in the 1780s to market his steam engines. He measured a pony could lift 220 lb 100 ft per minute, and a horse could do 33,000 ft·lb/min = 550 ft·lb/s = 745.7 W. This became the standard.
How do I convert kilowatts to horsepower?: kW × 1.341 = mechanical hp. kW × 1.360 = metric hp (PS). Example: 75 kW × 1.341 = 100.6 hp. Car engine power is typically listed in kW in Europe and hp in the US.
How do I convert watts to horsepower in Excel?: Use =A1/745.6999 to convert watts (in A1) to mechanical hp. Or use =CONVERT(A1,"W","HP"). For metric: =A1/735.4988 or =CONVERT(A1,"W","PS").
What is the watts to horsepower conversion for 500 watts?: 500 W = 0.6705 hp mechanical = 0.6798 PS metric. Common: 500 W electric scooter motor, 500 W power supply, 500 W halogen work light. Many small appliances run on 500-1500 W.
How do I convert watts to horsepower for cars?: Car power: 100 hp = 74.6 kW, 200 hp = 149 kW, 300 hp = 224 kW, 400 hp = 298 kW, 500 hp = 373 kW. Modern mid-size cars: 150-250 hp (112-186 kW). Sports cars: 300-500+ hp.
What is the watts to horsepower conversion for 2000 watts?: 2000 W = 2.682 hp mechanical. Common: 2000 W space heater, 2000 W electric kettle, 2000 W microwave (very powerful), 2000 W generator output (small). A 2000 W portable generator can power essential appliances.
How do I convert watts to horsepower for pumps?: Pump power: flow × head × density / efficiency. Small pump: 0.5 hp (373 W), sump pump: 0.5-1 hp (373-746 W), well pump: 0.5-2 hp (373-1491 W). Pump curves show hp requirements.
What is the watts to horsepower conversion for 750 watts?: 750 W ≈ 1.005 hp. This is very close to 1 hp (745.7 W). Common: 750 W microwave, 750 W vacuum cleaner, 750 W electric drill. A "1 hp" motor actually needs ~746 W.
How do I convert watts to horsepower for generators?: Generator sizes: 1 kW = 1.34 hp engine needed, 2 kW = 2.68 hp, 5 kW = 6.70 hp, 10 kW = 13.41 hp. Generator engine hp must exceed electrical output to account for alternator losses (~10-20%).
What is the difference between hp and bhp?: bhp (brake horsepower) is measured at the engine crankshaft. hp (horsepower) to wheels is lower due to drivetrain losses (~15-20% for FWD, 20-25% for RWD). bhp = wheel hp + drivetrain losses.
How do I convert watts to horsepower for lawn mowers?: Gas lawn mowers: push mower 3-7 hp (2.2-5.2 kW), riding mower 10-25 hp (7.5-18.6 kW). Electric mowers: 500-1500 W (0.67-2.0 hp). Engine displacement doesn't directly equal hp output.
What is the watts to horsepower conversion for 1500 watts?: 1500 W = 2.011 hp. Common: 1500 W space heater (typical US heater), 1500 W hair dryer, 1500 W microwave, 1500 W power supply. US standard outlet max is 1800 W (15 A × 120 V).
How do I convert watts to horsepower for industrial motors?: Industrial motor sizes: fractional: 0.25-0.75 hp (186-559 W), integral: 1-10 hp (746-7457 W), large: 50-500+ hp (37-373+ kW). Motors specify output hp and input kW based on efficiency.
What is the watts to horsepower conversion for 100 watts?: 100 W = 0.134 hp mechanical = 0.136 PS metric. Common: 100 W incandescent light bulb (now LED equivalent uses 10-15 W), 100 W desktop PC (idle), 100 W small fan.
How do I convert watts to horsepower for automotive specs?: Engine specs: 1 L engine ≈ 50-75 hp/L naturally aspirated, 100-150 hp/L turbo. Modern engines: Ford 2.0L EcoBoost 250 hp (186 kW), Toyota Camry 2.5L 203 hp (151 kW).
What is the watts to horsepower conversion for 3000 watts?: 3000 W = 4.023 hp. Common: 3000 W generator (typical household backup), 3000 W water heater element, 3000 W electric car charger (Level 2).
How do I convert watts to horsepower for HVAC?: HVAC: 1 ton AC = ~3.5 kW cooling = ~1 hp compressor. Furnace fans: 0.5-1 hp (373-746 W). Heat pump compressor: 1.5-5 hp (1.1-3.7 kW). Efficiency ratings: SEER, EER, HSPF.
What is the watts to horsepower conversion for 2500 watts?: 2500 W = 3.353 hp. Common: 2500 W generator, 2500 W electric pressure washer, 2500 W commercial microwave. Many household circuits (20 A × 120 V = 2400 W max).
How do I convert watts to horsepower for bicycles?: Cyclist power: casual rider 75-100 W = 0.10-0.13 hp, fitness rider 150-200 W = 0.20-0.27 hp, pro rider 300-400 W = 0.40-0.54 hp. Sprint: 1000+ W = 1.34+ hp for a few seconds.
What is the watts to horsepower conversion for 400 watts?: 400 W = 0.536 hp. Common: 400 W gaming PC (high-end), 400 W electric bike motor, 400 W solar panel, 400 W blender. Many exercise bikes measure output in watts.
How do I convert watts to horsepower for tractors?: Tractor PTO hp: compact 20-40 hp (15-30 kW), utility 40-100 hp (30-75 kW), row crop 100-300+ hp (75-224+ kW). Drawbar hp is lower (~85% of PTO hp) due to traction and rolling resistance.
What is the watts to horsepower conversion for 5500 watts?: 5500 W = 7.376 hp. 5.5 kW is a common generator size for home backup. Can power: well pump, refrigerator, lights, furnace. A 7.5 hp motor draws about 5.6 kW under load.
How do I convert watts to horsepower for aviation?: Aircraft engines: light plane 100-200 hp (75-149 kW), small twin 300-600 hp (224-447 kW). Thrust horsepower in jets is different: 1 lbf thrust ≈ 0.00136 hp per mph. Modern aviation uses kW or shp.
What is the watts to horsepower conversion for 3500 watts?: 3500 W = 4.694 hp. Common: 3500 W generator (RV/portable), 3500 W water heater (larger), 3500 W EV charger. 3.5 kW is also common for single-phase electric motors.
How do I convert watts to horsepower for muscle strength?: Human power: average adult 50-150 W sustained = 0.07-0.20 hp. Burst: 500-1000 W = 0.67-1.34 hp (Olympic weightlifter). A horse can produce ~1000 W = 1.34 hp sustained, but James Watt's estimate was conservative.