Convert Knots to Mach
1 knot = 0.001511782 Mach. Type any value below to convert in either direction — the calculation happens in your browser.
Knots to Mach formula
Multiply the number of knots by 0.001511782 to get Mach.
Mach = knots × 0.001511782To go the other way: divide the number of Mach by 0.001511782, or multiply by 661.470842.
knots = Mach ÷ 0.001511782Knots to Mach conversion table
| Knots | Mach |
|---|---|
| 1 kn | 0.001511782 M |
| 2 kn | 0.003023565 M |
| 3 kn | 0.004535347 M |
| 4 kn | 0.00604713 M |
| 5 kn | 0.007558912 M |
| 6 kn | 0.009070695 M |
| 7 kn | 0.01058248 M |
| 8 kn | 0.01209426 M |
| 9 kn | 0.01360604 M |
| 10 kn | 0.01511782 M |
| 15 kn | 0.02267674 M |
| 20 kn | 0.03023565 M |
| 25 kn | 0.03779456 M |
| 30 kn | 0.04535347 M |
| 40 kn | 0.0604713 M |
| 50 kn | 0.07558912 M |
| 75 kn | 0.1133837 M |
| 100 kn | 0.1511782 M |
| 250 kn | 0.3779456 M |
| 500 kn | 0.7558912 M |
| 1,000 kn | 1.511782 M |
Mach to Knots conversion table
| Mach | Knots |
|---|---|
| 1 M | 661.470842 kn |
| 2 M | 1,322.942 kn |
| 3 M | 1,984.413 kn |
| 4 M | 2,645.883 kn |
| 5 M | 3,307.354 kn |
| 6 M | 3,968.825 kn |
| 7 M | 4,630.296 kn |
| 8 M | 5,291.767 kn |
| 9 M | 5,953.238 kn |
| 10 M | 6,614.708 kn |
About the knot
A knot is one nautical mile per hour and is the speed unit used at sea and in aviation.
About the Mach
Mach 1 is the speed of sound, about 340.3 m/s at sea level in standard conditions.
Frequently asked questions
How many Mach are in a knot?
There are 0.001511782 Mach in one knot.
How many knots are in a Mach?
There are 661.470842 knots in one Mach.
Is this conversion exact?
The ratio between the knot and the Mach is fixed by definition, so the conversion is exact — the figures shown here are rounded for readability only.
What is 10 knots in Mach?
10 knots equals 0.01511782 Mach.