Knots
A Knot is a unit to measure speed. A knot is equal to one nautical mile per hour. Normally this unit is used in maritime and aviation.
Miles per hour (mph, mi/h)
Miles per hour (mph or mi/h) is the number of miles covered in one hour. It is the unit for road speeds in the United States and the United Kingdom, and 1 mph is exactly 0.44704 meters per second.
Some common Knots to Miles per hour conversions
8 knots to mph = 9.206236
1 knot to mph = 1.150779