Knots to Feet per Second Conversion (kn to ft/s)

Knots to Feet per Second Converter

Enter the speed in knots below to convert it to feet per second.

Result in Feet per Second:

1 kn = 1.68781 ft/s

How to Convert Knots to Feet per Second

To convert a measurement in knots to a measurement in feet per second, multiply the speed by the following conversion ratio: 1.68781 feet per second/knot.

Since one knot is equal to 1.68781 feet per second, you can use this simple formula to convert:

feet per second = knots × 1.68781

The speed in feet per second is equal to the speed in knots multiplied by 1.68781.

For example, here's how to convert 5 knots to feet per second using the formula above.

feet per second = (5 kn × 1.68781) = 8.439049 ft/s

Knots and feet per second are both units used to measure speed. Calculate speed in knots or feet per second using our speed calculator or keep reading to learn more about each unit of measure.

What Is a Knot?

One knot is equal to a speed of one nautical mile per hour,^[1] or one minute of latitude per hour.

Knots can be abbreviated as kn, and are also sometimes abbreviated as kt. For example, 1 knot can be written as 1 kn or 1 kt.

Learn more about knots.

What Are Feet per Second?

Feet per second are a measurement of speed expressing the distance traveled in feet in one second.

The foot per second is a US customary and imperial unit of speed. Feet per second can be abbreviated as ft/s, and are also sometimes abbreviated as ft/sec or fps. For example, 1 foot per second can be written as 1 ft/s, 1 ft/sec, or 1 fps.

In the expressions of units, the slash, or solidus (/), is used to express a change in one or more units relative to a change in one or more other units.^[2] For example, ft/s is expressing a change in length or distance relative to a change in time.

Feet per second can be expressed using the formula:
v_ft/s = d_ft / t_sec

The velocity in feet per second is equal to the distance in feet divided by time in seconds.

Learn more about feet per second.

Knot to Foot per Second Conversion Table

Table showing various knot measurements converted to feet per second.
Knots	Feet Per Second
1 kn	1.6878 ft/s
2 kn	3.3756 ft/s
3 kn	5.0634 ft/s
4 kn	6.7512 ft/s
5 kn	8.439 ft/s
6 kn	10.13 ft/s
7 kn	11.81 ft/s
8 kn	13.5 ft/s
9 kn	15.19 ft/s
10 kn	16.88 ft/s
11 kn	18.57 ft/s
12 kn	20.25 ft/s
13 kn	21.94 ft/s
14 kn	23.63 ft/s
15 kn	25.32 ft/s
16 kn	27 ft/s
17 kn	28.69 ft/s
18 kn	30.38 ft/s
19 kn	32.07 ft/s
20 kn	33.76 ft/s
21 kn	35.44 ft/s
22 kn	37.13 ft/s
23 kn	38.82 ft/s
24 kn	40.51 ft/s
25 kn	42.2 ft/s
26 kn	43.88 ft/s
27 kn	45.57 ft/s
28 kn	47.26 ft/s
29 kn	48.95 ft/s
30 kn	50.63 ft/s
31 kn	52.32 ft/s
32 kn	54.01 ft/s
33 kn	55.7 ft/s
34 kn	57.39 ft/s
35 kn	59.07 ft/s
36 kn	60.76 ft/s
37 kn	62.45 ft/s
38 kn	64.14 ft/s
39 kn	65.82 ft/s
40 kn	67.51 ft/s

Table showing various knot measurements converted to feet per second.

Knots

Feet Per Second

1 kn

1.6878 ft/s

2 kn

3.3756 ft/s

3 kn

5.0634 ft/s

4 kn

6.7512 ft/s

5 kn

8.439 ft/s

6 kn

10.13 ft/s

7 kn

11.81 ft/s

8 kn

13.5 ft/s

9 kn

15.19 ft/s

10 kn

16.88 ft/s

11 kn

18.57 ft/s

12 kn

20.25 ft/s

13 kn

21.94 ft/s

14 kn

23.63 ft/s

15 kn

25.32 ft/s

16 kn

27 ft/s

17 kn

28.69 ft/s

18 kn

30.38 ft/s

19 kn

32.07 ft/s

20 kn

33.76 ft/s

21 kn

35.44 ft/s

22 kn

37.13 ft/s

23 kn

38.82 ft/s

24 kn

40.51 ft/s

25 kn

42.2 ft/s

26 kn

43.88 ft/s

27 kn

45.57 ft/s

28 kn

47.26 ft/s

29 kn

48.95 ft/s

30 kn

50.63 ft/s

31 kn

52.32 ft/s

32 kn

54.01 ft/s

33 kn

55.7 ft/s

34 kn

57.39 ft/s

35 kn

59.07 ft/s

36 kn

60.76 ft/s

37 kn

62.45 ft/s

38 kn

64.14 ft/s

39 kn

65.82 ft/s

40 kn

67.51 ft/s

References

NASA, Knots Versus Miles per Hour, https://www.grc.nasa.gov/WWW/K-12/WindTunnel/Activities/knots_vs_mph.html
National Institute of Standards and Technology, NIST Guide to the SI, Chapter 6: Rules and Style Conventions for Printing and Using Units, https://www.nist.gov/pml/special-publication-811/nist-guide-si-chapter-6-rules-and-style-conventions-printing-and-using