At One Place

Mach to knots

1 mach in knots
1 Mach = 661.4708 kn
kn = Mach × 661.4708423

To convert mach to knots, multiply by 661.4708423. The table below gives the values people look up most often, and the converter works for any number.

Mach to knots table

Common mach values converted to knots.
Mach Knots
1 Mach 661.4708
2 Mach 1,322.9417
3 Mach 1,984.4125
4 Mach 2,645.8834
5 Mach 3,307.3542
10 Mach 6,614.7084
15 Mach 9,922.0626
20 Mach 13,229.417
25 Mach 16,536.771
30 Mach 19,844.125
40 Mach 26,458.834
50 Mach 33,073.542
75 Mach 49,610.313
100 Mach 66,147.084
250 Mach 165,367.71
500 Mach 330,735.42
1,000 Mach 661,470.84

How the conversion works

The relationship is kn = Mach × 661.4708423. Both units measure speed, so the conversion is a fixed factor that never changes.

Mach: Speed of sound at sea level, 15 °C.

Common questions

How many knots are in one mach?
One mach equals 661.4708 knots. kn = Mach × 661.4708423.
How do you convert mach to knots?
Use kn = Mach × 661.4708423. So 10 Mach is 6,614.7084 kn.
How many mach are in one knot?
One knot equals 0.0015118 mach, which is the reverse of the conversion above.
Is there more than one kind of mach?
Speed of sound at sea level, 15 °C.

Related pages

Sources

  1. Guide for the Use of the International System of Units (SP 811) — NIST (Public domain (US Government))
  2. The International System of Units (SI Brochure) — Bureau International des Poids et Mesures
  3. Calculated on this page — At One Place

How these figures are compiled and checked