Convert Knot (kn) (knot) to Miles per hour (mph) (mph)
Category: Speed
2.5 knot = 2.876946 mph
High-precision rounding: 6 decimals
How to convert knot (kn) to miles per hour (mph)
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 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.
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.
Related conversions from knot
- knot → kmh Kilometers per hour (km/h)
- knot → mach Mach (sea-level approx.)
- knot → ms Meters per second (m/s)
Related conversions to mph
- kmh → mph Kilometers per hour (km/h)
- mach → mph Mach (sea-level approx.)
- ms → mph Meters per second (m/s)