Convert the speed of sound to miles per hour

Explanation

From this page you can convert the speed of sound to miles per hour (or Mach to mph) simply, by using the application above.

In case you are wondering, to convert from the speed of sound to miles per hour you need to multiply by 767.5815. This factor is calculated using the respective definitions of the two units you can find below.

Formula

1 Mach≈767.5815 mph

speed of soundMach

dimension	speed
symbol	Mach

This unit represents the speed of sound in air at 20 °C.

Definition

The speed of sound varies with the medium the sound travels through.

Value

We use the speed of sound in air at 20 °C. With the approximation that air is an ideal gas the speed of sound only depends on the temperature as other parameters cancel out.

We use a formula adapted from this one to directly yield meters per second from a temperature in kelvin:

59620973180000 × ( T/273.15 )^0.5

Value in terms of the SI

The approximate value of the speed of sound is 343.14 meters per second.

Equivalences

The speed of sound is equivalent to:

Some Facts

The sound travels at 12000 m/s in diamond, almost 35 times faster than in air.
The Mach number is the ratio between the speed of an object in a medium and the speed of sound in the same medium. Therefore, Mach 1 is the speed of sound, and for example Mach 20 is 20 times the speed of sound (approximately 15 000 mph).

Related Conversions

miles per hourmph

dimension	speed
symbol	mph, mi/h

The mile per hour (mph, mi/h) is a unit of speed.

Definition of the mile per hour

One mile per hour is equal to the speed of an object traveling one mile in a time of one hour.

Value in terms of the SI

One mile per hour is equivalent to ¹³⁹⁷⁄₃₁₂₅ meters per second.

Equivalences

One mile per hour is also equivalent to:

Some Facts

The fastest fish, the sailfish, can swim to up to 65 mph (105 kmh).

Other speeds

	second	minute	hour
inch	ips	ipmin	iph
foot	fps	fpmin	fph
yard	yps	ypmin	yph
mile	mps	mpmin	mph