Knots to feet per second

feet per second = knots × 1.68781

How to convert knots to feet per second

One knot is 1.68781 feet per second, so multiply the number of knots by 1.68781. For example, 20 knots is 20 × 1.68781 = 33.756197 feet per second. To go back, divide by the same number, or multiply by 0.5924838.

Quick estimate

Multiplying by about 1.7 gets within 0.7% of the exact answer, which is enough to check that a result makes sense.

Where it comes up

Speed conversions come up when driving abroad, in running and cycling paces, weather and wind reports, and sailing and flying.

knots	feet per second
1 kn	1.68781 fps
2 kn	3.37562 fps
3 kn	5.06343 fps
4 kn	6.751239 fps
5 kn	8.439049 fps
6 kn	10.126859 fps
7 kn	11.814669 fps
8 kn	13.502479 fps
9 kn	15.190289 fps
10 kn	16.878099 fps
11 kn	18.565908 fps
12 kn	20.253718 fps
13 kn	21.941528 fps
14 kn	23.629338 fps
15 kn	25.317148 fps
16 kn	27.004958 fps
17 kn	28.692768 fps
18 kn	30.380577 fps
19 kn	32.068387 fps
20 kn	33.756197 fps
25 kn	42.195246 fps
30 kn	50.634296 fps
40 kn	67.512394 fps
50 kn	84.390493 fps
60 kn	101.268591 fps
70 kn	118.14669 fps
75 kn	126.585739 fps
80 kn	135.024789 fps
90 kn	151.902887 fps
100 kn	168.780986 fps
120 kn	202.537183 fps
150 kn	253.171479 fps
200 kn	337.561971 fps
250 kn	421.952464 fps
300 kn	506.342957 fps
400 kn	675.123943 fps
500 kn	843.904929 fps
750 kn	1,265.86 fps
1,000 kn	1,687.81 fps
1,500 kn	2,531.71 fps
2,000 kn	3,375.62 fps
5,000 kn	8,439.05 fps
10,000 kn	16,878.1 fps

Questions

How many feet per second are in a knot?

1.68781 feet per second.

How do I convert knots to feet per second in a spreadsheet?

Put the value in A1 and type =A1*1.68781, then fill the formula down the column.

Are the values in the table exact?

They are calculated from the exact definitions of the units and rounded only for display. Open any row for the full working.