Speed of Light to Mach Number Converter
Enter the speed in speed of light below to get the value converted to Mach number.
Do you want to convert Mach number to speed of light?
How to Convert Speed of Light to Mach Number
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:
The Mach number is equal to the speed in speed of light multiplied by 874,030.489796.
Speed of light and Mach number are both units used to measure speed. Keep reading to learn more about each unit of measure.
What is the Speed of Light?
The speed of light is equal to exactly 299,792,458 meters per second, or 670,616,629 miles per hour. The definition of the speed of light is actually derived from the most recent 1983 international definition of the meter.
Speed of light can be abbreviated as c; for example, 1 speed of light can be written as 1 c.
Learn more about the speed of light.
What is 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 Classification||Mach Number|
|Subsonic||Mach < 1.0|
|Transonic||Mach = 1.0|
|Supersonic||Mach > 1.0|
|Hypersonic||Mach > 5.0|
Learn more about Mach number.
Speed of Light to Mach Conversion Table
|Speed Of Light||Mach Number|
|0.00001 c||8.7403 M|
|0.00002 c||17.48 M|
|0.00003 c||26.22 M|
|0.00004 c||34.96 M|
|0.00005 c||43.7 M|
|0.00006 c||52.44 M|
|0.00007 c||61.18 M|
|0.00008 c||69.92 M|
|0.00009 c||78.66 M|
|0.000001 c||0.87403 M|
|0.00001 c||8.7403 M|
|0.0001 c||87.4 M|
|0.001 c||874.03 M|
|0.01 c||8,740 M|
|0.1 c||87,403 M|
|1 c||874,030 M|
- National Institute of Standards and Technology, SI Redefinition: Meter, https://www.nist.gov/si-redefinition/meter
- NASA, Mach Number, https://www.grc.nasa.gov/WWW/BGH/mach.html
More Speed of Light & Mach Conversions
- speed of light to knots
- speed of light to speed of sound
- speed of light to miles per hour
- speed of light to feet per second
- speed of light to kilometers per second
- speed of light to kilometers per hour
- speed of light to meters per second
- speed of light to centimeters per second
- knots to Mach number
- speed of sound to Mach number
- miles per hour to Mach number
- feet per second to Mach number
- kilometers per second to Mach number
- kilometers per hour to Mach number
- meters per second to Mach number
- centimeters per second to Mach number