Convert Miles per hour (mph) (mph) to Knot (kn) (knot)
Category: Speed
1 mph = 0.868977 knot
High-precision rounding: 6 decimals
How to convert miles per hour (mph) to knot (kn)
We convert by pivoting through the SI base unit for Speed and applying exact factors where applicable.
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Examples
Linear unit conversions use standardized factors; many are exact by definition (e.g., 1 in = 25.4 mm, 1 ft = 0.3048 m).
Common mistakes
- Mixing mph with knots in navigation; 1 kn = 1 nmi/h.
About Speed
Speed combines distance and time. Science favors m/s, drivers see km/h or mph, and navigation uses knots (nautical miles per hour). Context determines the most convenient representation and rounding.
About Miles per hour (mph)
Miles per hour (mph)
Primary speed unit in the US and parts of the UK. Aviation weather occasionally mixes knots and mph in legacy feeds.
History: Based on the international mile; persisted in road regulations and vehicle instrumentation.
About Knot (kn)
Knot (kn)
Equals 1 nautical mile per hour. Standard in maritime and aviation because it ties speed to Earth geometry.
History: Name comes from counting knots in a log line; standardized with the nautical mile.
Related conversions from mph
- mph → kmh Kilometers per hour (km/h)
- mph → mach Mach (sea-level approx.)
- mph → ms Meters per second (m/s)
Related conversions to knot
- kmh → knot Kilometers per hour (km/h)
- mach → knot Mach (sea-level approx.)
- ms → knot Meters per second (m/s)