Convert Miles per hour (mph) (mph) to Mach (sea-level approx.) (mach)
Category: Speed
1 mph = 0.001314 mach
High-precision rounding: 6 decimals
How to convert miles per hour (mph) to mach (sea-level approx.)
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 Mach (sea-level approx.)
Mach
Dimensionless ratio to the local speed of sound (≈343 m/s at 20 °C, sea level). Critical for aerodynamics and compressibility effects.
History: Named after Ernst Mach; value varies with temperature and medium, so ‘Mach 1’ is not a fixed m/s.
Related conversions from mph
- mph → kmh Kilometers per hour (km/h)
- mph → knot Knot (kn)
- mph → ms Meters per second (m/s)
Related conversions to mach
- kmh → mach Kilometers per hour (km/h)
- knot → mach Knot (kn)
- ms → mach Meters per second (m/s)