How to convert watts to metric horsepower
To convert a measurement in watts to metric horsepower, multiply the value by 0.001359621617. The conversion factor comes from the relationship between both units and the watt.
For example, to convert 5 W to metric horsepower: 5 × 0.001359621617 = 0.006798108087 PS.
What is a watt?
A watt is the SI derived unit of power, equal to one joule of energy per second (1 J/s). Named after Scottish engineer James Watt, whose steam-engine improvements powered the Industrial Revolution. The watt became the SI unit of power in 1960 and now measures everything from light bulbs to power plants.
Common uses of watts include: Light bulb and appliance ratings; Electronic device power consumption; Audio amplifier output; Scientific and electrical calculations.
What is a metric horsepower?
Metric horsepower (PS or cv) is a unit of power equal to exactly 735.49875 watts, slightly less than mechanical horsepower. Defined in continental Europe, metric horsepower (from the German 'Pferdestärke', PS) is the traditional unit for car engine power in Europe and Japan, where figures are often quoted in PS.
Common uses of metric horsepower include: European and Japanese car engine ratings; Motorcycle power specifications; Comparing PS to hp and kW; Automotive marketing figures.
Watts to metric horsepower worked examples
Here are some common values converted:
1 W = 0.001359621617 PS 5 W = 0.006798108087 PS 10 W = 0.013596216173 PS 50 W = 0.067981080865 PS 100 W = 0.13596216173 PS
Frequently asked questions
How many metric horsepower are in one watt?
One watt (W) equals 0.001359621617 metric horsepower (PS). Multiply any value in watts by 0.001359621617 to convert to metric horsepower.
How do I convert watts to metric horsepower?
Multiply the value in watts by 0.001359621617. For example, 5 W × 0.001359621617 = 0.006798108087 PS.
How do I convert metric horsepower to watts?
Multiply the value in metric horsepower by 735.49875, or divide by 0.001359621617. Use the swap button on the converter above to reverse the direction.
Is the watt to metric horsepower conversion exact?
Mechanical horsepower is defined as exactly 745.7 W and metric horsepower as 735.49875 W. SI conversions are exact.
What is the formula for watts to metric horsepower?
The formula is: PS = W × 0.001359621617. This comes from the definition of both units relative to the watt.