Convert Speed Of Light to Mach Number

Enter the speed in speed of light below to get the value converted to Mach number.

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1 c = Mach 874,030.489796

How to Convert Speed Of Light to Mach Number

Speedometers are used in vehicles to measure speed

To convert a speed of light measurement to a Mach measurement, multiply the speed by the conversion ratio. One speed of light is equal to Mach 874,030.489796, so use this simple formula to convert:

Mach number = speed of light × 874,030.489796

The Mach number is equal to the speed in speed of light multiplied by 874,030.489796.

For example, here's how to convert 5 speed of light to Mach number using the formula above.
5 c = (5 × 874,030.489796) = Mach 4,370,152.44898

Speed of light and Mach number are both units used to measure speed. Keep reading to learn more about each unit of measure.

Speed Of Light

The speed of light is equal to exactly 299,792,458 meters per second, or 670,616,629 miles per hour.

Speed of light can be abbreviated as c, for example 1 speed of light can be written as 1 c.

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

Speed Of Light Measurements and Equivalent Mach Conversions

Common speed of light values converted to the equivalent Mach value
Speed Of Light Mach Number
1 c Mach 874,030
2 c Mach 1,748,061
3 c Mach 2,622,091
4 c Mach 3,496,122
5 c Mach 4,370,152
6 c Mach 5,244,183
7 c Mach 6,118,213
8 c Mach 6,992,244
9 c Mach 7,866,274
10 c Mach 8,740,305
11 c Mach 9,614,335
12 c Mach 10,488,366
13 c Mach 11,362,396
14 c Mach 12,236,427
15 c Mach 13,110,457
16 c Mach 13,984,488
17 c Mach 14,858,518
18 c Mach 15,732,549
19 c Mach 16,606,579
20 c Mach 17,480,610
21 c Mach 18,354,640
22 c Mach 19,228,671
23 c Mach 20,102,701
24 c Mach 20,976,732
25 c Mach 21,850,762
26 c Mach 22,724,793
27 c Mach 23,598,823
28 c Mach 24,472,854
29 c Mach 25,346,884
30 c Mach 26,220,915
31 c Mach 27,094,945
32 c Mach 27,968,976
33 c Mach 28,843,006
34 c Mach 29,717,037
35 c Mach 30,591,067
36 c Mach 31,465,098
37 c Mach 32,339,128
38 c Mach 33,213,159
39 c Mach 34,087,189
40 c Mach 34,961,220

More Speed Of Light Speed Conversions

Convert to Knots
1 c is equal to 582,749,918.4 knots
Convert to Speed Of Sound
1 c is equal to 874,030.5 speed of sound
Convert to Miles Per Hour
1 c is equal to 670,616,629.4 miles per hour
Convert to Feet Per Second
1 c is equal to 983,571,056.4 feet per second
Convert to Kilometers Per Second
1 c is equal to 299,792.5 kilometers per second
Convert to Kilometers Per Hour
1 c is equal to 1,079,252,848.8 kilometers per hour
Convert to Meters Per Second
1 c is equal to 299,792,458 meters per second
Convert to Centimeters Per Second
1 c is equal to 29,979,245,800 centimeters per second