Mach to Knots (Ma to kn) Converter

How to convert Mach to knots

Formulakn = Ma × 661.4708423

Multiply the value in Mach by 661.4708423. To go the other way, multiply by 0.001511782434 (or divide by 661.4708423).

A Mach is larger than a knot: one Mach contains 661.4708423 knots.

Worked examples

1 Mach (ISA sea level)1 Ma × 661.4708423 = 661.4708423 kn
5 Mach5 Ma × 661.4708423 = 3,307.354212 kn
10 Mach10 Ma × 661.4708423 = 6,614.708423 kn
20 Mach20 Ma × 661.4708423 = 13,229.41685 kn
100 Mach100 Ma × 661.4708423 = 66,147.08423 kn

Mach to knots conversion table

Values are calculated by the conversion engine and rounded to 8 significant figures.

Mach to knots: 0.1–10 Ma
Mach (Ma)	Knots (kn)
0.1 Ma	66.147084 kn
0.25 Ma	165.36771 kn
0.5 Ma	330.73542 kn
1 Ma	661.47084 kn
2 Ma	1,322.9417 kn
3 Ma	1,984.4125 kn
4 Ma	2,645.8834 kn
5 Ma	3,307.3542 kn
6 Ma	3,968.8251 kn
7 Ma	4,630.2959 kn
8 Ma	5,291.7667 kn
9 Ma	5,953.2376 kn
10 Ma	6,614.7084 kn

Mach to knots: 12–1,000 Ma
Mach (Ma)	Knots (kn)
12 Ma	7,937.6501 kn
15 Ma	9,922.0626 kn
20 Ma	13,229.417 kn
25 Ma	16,536.771 kn
30 Ma	19,844.125 kn
40 Ma	26,458.834 kn
50 Ma	33,073.542 kn
75 Ma	49,610.313 kn
100 Ma	66,147.084 kn
250 Ma	165,367.71 kn
500 Ma	330,735.42 kn
1,000 Ma	661,470.84 kn

About the units

Mach (Ma)

The speed of sound depends on air temperature. This converter uses the International Standard Atmosphere value at sea level, 15 °C: about 340.29 m/s (1,225 km/h, 761 mph). Mach depends on air temperature; this uses the ISA sea-level speed of sound, 340.29 m/s (15 °C).

Knot (kn)

One nautical mile per hour (about 1.15 mph). The standard speed unit for ships, aircraft and wind reports. One knot equals 0.5144444444 meters per second (m/s).

Frequently asked questions

How many knots are in one Mach?

There are 661.4708423 knots in one Mach.

How do I convert Mach to knots?

Multiply the number of Mach by 661.4708423. For example, 10 Ma × 661.4708423 = 6,614.708423 kn.

How many Mach are in one knot?

One knot equals 0.001511782434 Mach. That is the reverse factor, 1 ÷ 661.4708423.

What is 10 Mach in knots?

10 Ma = 6,614.708423 kn.

Is this Ma to kn converter accurate?

The conversion uses the accepted reference value (Mach depends on air temperature; this uses the ISA sea-level speed of sound, 340.29 m/s (15 °C).). Results are shown to 12 significant figures by default; adjust precision in the converter.

Mach to Knots Converter