Convert Miles Per Hour to Mach Number

Enter the speed in miles per hour below to get the value converted to Mach number.

Results in Mach Number:
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1 mph = Mach 0.001303

How to Convert Miles Per Hour to Mach Number

conversion scale showing miles per hour and equivalent Mach number speed values

To convert a mile per hour measurement to a Mach measurement, multiply the speed by the conversion ratio. One mile per hour is equal to Mach 0.001303, so use this simple formula to convert:

Mach number = miles per hour × 0.001303

The Mach number is equal to the speed in miles per hour multiplied by 0.001303.

For example, here's how to convert 5 miles per hour to Mach number using the formula above.
5 mph = (5 × 0.001303) = Mach 0.006517

Miles per hour and Mach number are both units used to measure speed. Keep reading to learn more about each unit of measure.

Miles Per Hour

Miles per hour are a measurement of speed expressing the distance travelled in miles in one hour.

The mile per hour is a US customary and imperial unit of speed. Miles per hour can be abbreviated as mph, and are also sometimes abbreviated as mi/h or MPH. For example, 1 mile per hour can be written as 1 mph, 1 mi/h, or 1 MPH.

Miles per hour can be expressed using the formula:
vmph = dmithr

The velocity in miles per hour is equal to the distance in miles divided by time in hours.

Mach Number

Mach, sometimes also referred to as a Mach number, is the ratio of the speed of an object to the speed of sound.

Mach can be abbreviated as M, and is also sometimes abbreviated as Ma. For example, Mach 1 can be written as 1 M or 1 Ma.

Although Mach can be abbreviated M or Ma, the Mach number is typically expressed with the number after the unit name. For example, the expression Mach 3 is preferred rather than 3 Machs or 3 M.

The speed is classified as either subsonic, transonic, supersonic, or hypersonic depending on the Mach number.

Speed classifications for various mach numbers.
Speed Classification Mach Number
Subsonic Mach < 1.0
Transonic Mach = 1.0
Supersonic Mach > 1.0
Hypersonic Mach > 5.0

Mile Per Hour Measurements and Equivalent Mach Conversions

Common mile per hour values converted to the equivalent Mach value
Miles Per Hour Mach Number
1 mph Mach 0.001303
2 mph Mach 0.002607
3 mph Mach 0.00391
4 mph Mach 0.005213
5 mph Mach 0.006517
6 mph Mach 0.00782
7 mph Mach 0.009123
8 mph Mach 0.010427
9 mph Mach 0.01173
10 mph Mach 0.013033
11 mph Mach 0.014337
12 mph Mach 0.01564
13 mph Mach 0.016943
14 mph Mach 0.018247
15 mph Mach 0.01955
16 mph Mach 0.020853
17 mph Mach 0.022157
18 mph Mach 0.02346
19 mph Mach 0.024763
20 mph Mach 0.026066
21 mph Mach 0.02737
22 mph Mach 0.028673
23 mph Mach 0.029976
24 mph Mach 0.03128
25 mph Mach 0.032583
26 mph Mach 0.033886
27 mph Mach 0.03519
28 mph Mach 0.036493
29 mph Mach 0.037796
30 mph Mach 0.0391
31 mph Mach 0.040403
32 mph Mach 0.041706
33 mph Mach 0.04301
34 mph Mach 0.044313
35 mph Mach 0.045616
36 mph Mach 0.04692
37 mph Mach 0.048223
38 mph Mach 0.049526
39 mph Mach 0.05083
40 mph Mach 0.052133

More Mile Per Hour Speed Conversions

Convert to Knots
1 mph is equal to 0.868976 knots
Convert to Speed Of Sound
1 mph is equal to 0.001303 speed of sound
Convert to Speed Of Light
1 mph is equal to 1.4912E-9 speed of light
Convert to Feet Per Second
1 mph is equal to 1.466667 feet per second
Convert to Kilometers Per Second
1 mph is equal to 0.000447 kilometers per second
Convert to Kilometers Per Hour
1 mph is equal to 1.609344 kilometers per hour
Convert to Meters Per Second
1 mph is equal to 0.44704 meters per second
Convert to Centimeters Per Second
1 mph is equal to 44.704 centimeters per second