UnitConvConvert
Power

Convert watts to mechanical horsepower

1 W=0.001341hp

Use the converter below to change any watts value into mechanical horsepower instantly — with formula, conversion table, and real-world examples.

0.001341

Conversion formula

Forward
mechanical horsepower = watts × 0.001341
Reverse
watts = mechanical horsepower × 745.7

Example: 10 W × 0.001341 = 0.01341 hp.

About both units

From

Watt

W

The watt is the SI unit of power — 1 joule per second. Named after James Watt. Common examples: LED bulb 5–10 W, laptop 45–100 W, kettle 2000–3000 W, car engine 50,000+ W.

Real-world: LED bulb: 5–10 W. Laptop: 45 W. Kettle: 2200 W. Oven: 2000 W. Sun per m² on Earth: 1361 W/m².
Read full watt reference →
To

Mechanical Horsepower

hp

Mechanical horsepower equals 745.7 watts — James Watt's 1782 definition based on horse labor. Used in US car engines, aircraft and some industrial equipment. US muscle cars quote hp; European cars usually kW or PS.

Real-world: Base Ford Mustang: ~310 hp. Lawn mower: 5 hp. Average car: 150–200 hp.
Read full mechanical horsepower reference →

Watt to Mechanical Horsepower conversion table

Common watts to mechanical horsepower values for quick reference.

Watt (W)Mechanical Horsepower (hp)
1 W0.001341 hp
5 W0.006705 hp
10 W0.01341 hp
50 W0.06705 hp
100 W0.1341 hp
500 W0.6705 hp
1,000 W1.34102 hp
5,000 W6.70511 hp
10,000 W13.4102 hp
50,000 W67.0511 hp

Tips & common mistakes

Quick tips

  • 1 W = 1 J/s = 1 V × 1 A (for DC).
  • LED lighting: 10× more efficient than incandescent.
  • For home appliances, rating × hours used = kWh.

Avoid these

  • Confusing watts (power) with joules (energy).
  • Assuming "100 W bulb" for LED — old incandescent rating.
  • Mixing W with V or A — different quantities.

Frequently asked questions

How many mechanical horsepower in a watt?
One watt equals 0.001341 mechanical horsepower.
How do I convert watts to mechanical horsepower?
Multiply the watt value by 0.001341 to get the equivalent in mechanical horsepower.
What is 100 watts in mechanical horsepower?
100 watts equals 0.1341 mechanical horsepower.
Is a watt bigger than a mechanical horsepower?
No. 1 watt equals 0.001341 mechanical horsepower, so one watt is smaller.
How to convert watts to mechanical horsepower without a calculator?
Multiply by 0 for a quick estimate; use a calculator for precise results.

Related power conversions

📊 See full comparison matrix →

More from Watt

W → kW
1 = 0.001 kW
W → MW
1 = 1.0000e-6 MW
W → PS
1 = 0.00136 PS
W → BTU/h
1 = 3.41214 BTU/h
W → ft·lbf/s
1 = 0.7376 ft·lbf/s
W → VA
1 = 1 VA

More to Mechanical Horsepower

kW → hp
1 = 1.34102 hp
MW → hp
1 = 1,341.02 hp
PS → hp
1 = 0.9863 hp
BTU/h → hp
1 = 0.000393 hp
ft·lbf/s → hp
1 = 0.001818 hp
VA → hp
1 = 0.001341 hp

Conversions in other categories

WeightKilogram → PoundLengthKilometer → MileTemperatureCelsius → FahrenheitVolumeLiter → US GallonAreaSquare Meter → Square FootSpeedKilometer per Hour → Mile per HourEnergyKilojoule → KilocaloriePressureBar → Pound per Square Inch