1 Knot equals 1.15078 Miles per Hour.
| Knot (kn) | Mile per Hour (mph) |
|---|---|
| 0.001 kn | 0.00115078 mph |
| 0.01 kn | 0.0115078 mph |
| 0.1 kn | 0.115078 mph |
| 1 kn | 1.15078 mph |
| 2 kn | 2.30156 mph |
| 5 kn | 5.75389 mph |
| 10 kn | 11.5078 mph |
| 25 kn | 28.7695 mph |
| 50 kn | 57.5389 mph |
| 100 kn | 115.078 mph |
| 500 kn | 575.389 mph |
| 1,000 kn | 1,150.78 mph |
To convert Knots to Miles per Hour, multiply the value by 1.15078. This factor comes from the ratio of the two units' definitions: one Knot equals 1.15078 Miles per Hour.
For example: 1 Knot = 1.15078 Miles per Hour, and 10 Knots = 11.5078 Miles per Hour.
To convert in the reverse direction — from Miles per Hour to Knots — multiply by 0.868977.
The knot is a unit of speed equal to one nautical mile per hour, or approximately 1.852 km/h (1.151 mph). Its name comes from the historical method of measuring ship speed: a rope with knots tied at uniform intervals was fed out over the stern as a log floated in the water; counting the number of knots that ran through a sailor's hands in 28 seconds gave the ship's speed in knots. The practice dates to the 16th or 17th century and persisted into the 20th century before electronic logs replaced it.
Today knots are the universal standard for speed in maritime and aviation navigation worldwide — one of the few non-SI units accepted internationally without reservation. Air traffic control communicates aircraft speeds in knots; ships' logs record speed in knots; meteorological buoys report ocean current speeds in knots; and weather forecasts in marine and coastal areas use knots for wind speed. A typical commercial jet cruises at 450–490 knots (about 830–910 km/h).
The knot's survival in a metric world reflects the practical geometry of navigation. Since a nautical mile corresponds to one minute of latitude, a vessel traveling at 10 knots covers 10 minutes of latitude per hour — which means that latitude-based position calculations simplify elegantly. Expressing that speed in km/h (18.52 km/h) or m/s (5.14 m/s) adds no navigational value and discards a useful geometric relationship. So knots persist in navigation as a technically motivated exception to metric standardization.
Miles per hour (mph or mi/h) is the standard speed unit for road transport in the United States and the United Kingdom. All US and UK speed limit signs, speedometers, and traffic law enforcement use mph. A speed limit of 55 mph (about 89 km/h) on a US freeway and a limit of 70 mph (113 km/h) on a British motorway are familiar to drivers in those countries. Shipping and weather services in the US also use mph for wind speeds and storm movement.
In athletics, miles per hour provides intuitive benchmarks: a casual jogger runs at about 5–6 mph; a competitive runner might race a 5K at 10–11 mph; Usain Bolt's world record 100m sprint averaged just over 23 mph (37.6 km/h). Baseball pitch speeds are reported in mph — a major league fastball at 95+ mph is an elite pitch. American football field-goal kicking distances and punting trajectories are analyzed with speed in mph.
Converting between mph and km/h is a common practical need: mph × 1.609 ≈ km/h, or more roughly, mph × 1.6. A speed of 60 mph is almost exactly 96.6 km/h — close enough to 100 km/h that many drivers use 60 mph ≈ 100 km/h as a mental shorthand when driving across the US-Canada border. The exact multiplier 1.609344 comes from the definition of the statute mile as exactly 1,609.344 meters.
1 Knot equals 1.15078 Miles per Hour.
To convert Knots to Miles per Hour, multiply by 1.15078. For example, 1 Knot = 1.15078 Miles per Hour.
1 Mile per Hour equals 0.868977 Knots.