Both are used to measure power. The horsepower is simply the Imperial unit for power, whereas the watt is the SI unit for power, where one horsepower is equivalent to 746 watts.
In North America, it is traditional to measure the output power of an electric motor in horsepower, while the watt is used to measure its input power. Elsewhere in the world, the watt is used to measure both input power and output power. (The difference between output power and the input power is due to losses, such as heat transfer, friction, windage [air resistance], etc.)
Outside North America, the output power of a car engine is now measured in kilowatts rather than in horsepower.
1hp=746watts
power difference
Power is a quantity, and the watt is its unit of measurement.
1 horsepower = 746 watts 1 watt = 0.00134 horsepower (rounded)
The difference is in the output frequency.
The relationship is, a watt is the product of amps x volts.
3minutes
Horsepower is a measure of power, the metric unit of power is the watt. One watt is one joule per second.
The difference between a hemi 265 and a hemi 245 is the horsepower. The 265 has a 218 @ 4,800 gross horsepower while the 245 has 165 @ 4,400 gross horsepower.
James watt
700 watt is 0.93871 horespower
15W, asuming that you are talking about the same type of lamp.