Knot to Foot/Second Converter

Speed Converter

18 units available

Decimals:

From

To

1.68781

1 kn = 1.68781 ft/s

Formula:

ft/s = kn × 1.6878098556

With your value: 1 kn = 1.68780986 ft/s

How big is that?

Everyday references on a logarithmic scale, all expressed in knot so you can sanity-check the result.

Your value1.00 kn

Walking pace (2.7× your value)2.72 kn

Cycling (11× your value)10.7 kn

Urban speed limit (50 km/h) (27× your value)27.0 kn

Cheetah sprint (56× your value)56.4 kn

Motorway (110 km/h) (59× your value)59.5 kn

Other Knot to Foot/Second conversions

2 kn to ft/s 3 kn to ft/s 4 kn to ft/s 5 kn to ft/s 6 kn to ft/s 7 kn to ft/s 8 kn to ft/s

Knot to Foot/Second Conversion Table

Knot (kn)	Foot/Second (ft/s)
0.5	0.843905
1	1.68781
2	3.37562
5	8.439049
10	16.878099
15	25.317148
20	33.756197
25	42.195246
50	84.390493
100	168.780986
250	421.952464
500	843.904928
1000	1,687.809856

Foot/Second to Knot Conversion Table

Foot/Second (ft/s)	Knot (kn)
0.5	0.296242
1	0.592484
2	1.184968
5	2.962419
10	5.924838
15	8.887257
20	11.849676
25	14.812095
50	29.62419
100	59.24838
250	148.12095
500	296.241901
1000	592.483802

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Knot (kn)

Speed

Exact conversion

Derived quantity: a defined length divided by a defined time interval.

Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)

Bureau International des Poids et Mesures · Reviewed 2026-07-01

Foot/Second (ft/s)

Speed

Exact conversion

Derived quantity: a defined length divided by a defined time interval.

Source: BIPM, The International System of Units (SI), 9th edition, 2019 (updated 2024)

Bureau International des Poids et Mesures · Reviewed 2026-07-01

How to Convert Knot to Foot/Second

To convert from Knot (kn) to Foot/Second (ft/s), multiply the value by 1.6878098556.

Formula: ft/s = kn × 1.6878098556

Reverse: kn = ft/s × 0.5924838018

Step-by-Step Example

Start with your value in Knot. For example: 5 kn
Multiply by the conversion factor: 5 x 1.6878098556
The result is: 8.439049 ft/s

About Knot

The knot equals one nautical mile per hour and is used in maritime and aviation contexts.

Fun Fact: The knot gets its name from the practice of using a knotted rope to measure ship speed.

Common uses: navigation, aviation, sailing.

About Foot/Second

The foot/second (ft/s) is a unit of speed and velocity. One foot/second equals 0.3048 metre per seconds. UnitConvertLab converts it against every other speed unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: speed calculations, engineering and science, education.

Frequently Asked Questions

How many Foot/Second are in 1 Knot?

There are exactly 1.6878098556 Foot/Second in 1 Knot. This means the conversion factor from Knot to Foot/Second is 1.6878098556.

What is the formula to convert Knot to Foot/Second?

The formula to convert Knot to Foot/Second is: ft/s = kn × 1.6878098556. For example, to convert 10 Knot to Foot/Second, you would multiply 10 by 1.6878098556.

What is a Knot?