miles per hour = knots
6.0 = 5.21386
7.0 = 6.08283
8.0 = 6.95181
9.0 = 7.82079
10 = 8.68976
1 knot (kn, kt or kts) = 1.15077945 miles per hour (mph) = 1.852 kilometer per hour (km/h or kph) = 1.68780986 foot / second (ft/s) = 0.514444444 meters per second (m/s). The knot is a non-SI unit of speed. One knot is equal to one nautical mile per hour.