Horsepower

A unit of measure for work rate, primarily of an engine, in relation to that produced by a horse, and is used to express the power that can be produced. One mechanical (or imperial) horsepower equates to 0.746kW, whilst a metric horsepower equates to 0.735kW, although there are other different horsepower measures. The mechanical horsepower is probably the most common one to use, although there is only about 1.5% difference between them and from a turf management perspective this has little practical difference or meaning. For example, a 50 hp tractor would produce either 37.3kW or 36.75kW depending on the conversion type used.