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

1 kn = 1.688 ft/s

How many Feet per Second in a Knot?Printable chart →

Converting knots (kn) to feet per second (ft/s) is essential for various applications, especially in navigation and aviation. With the conversion factor of 1 kn equaling 1.68781 ft/s, you can quickly determine speeds in familiar units. Whether you're planning a sailing trip or just curious about speed measurements, our converter makes it easy.

Knot (kn)

Foot per Second (ft/s)

1.687808

≈ 1 11/16 ft/s

Conversion Formula

ft/s = kn × 1.68781

Reverse: kn = ft/s × 0.592484

Quick mental math: To quickly estimate feet per second from knots, multiply the number of knots by 1.7.

Conversion Examples

1 kn × 1.68781 =

1.688 ft/s

1 Knots = 1.688 Feet per Second

5 kn × 1.68781 =

8.439 ft/s

5 Knots = 8.439 Feet per Second

10 kn × 1.68781 =

16.878 ft/s

10 Knots = 16.878 Feet per Second

25 kn × 1.68781 =

42.195 ft/s

25 Knots = 42.195 Feet per Second

50 kn × 1.68781 =

84.39 ft/s

50 Knots = 84.39 Feet per Second

100 kn × 1.68781 =

168.781 ft/s

100 Knots = 168.781 Feet per Second

Knot to Foot per Second Table

Quick convert your value:

kn =—ft/s

Start:Step:Rows:Precision:

Knot (kn)	Foot per Second (ft/s)	Fraction
1	1.6878	1 11/16
2	3.3756	3 3/8
3	5.0634	5 1/16
4	6.7512	6 3/4
5	8.439	8 7/16
6	10.1269	10 1/8
7	11.8147	11 13/16
8	13.5025	13 1/2
9	15.1903	15 3/16
10	16.8781	16 7/8
11	18.5659	18 9/16
12	20.2537	20 1/4
13	21.9415	21 15/16
14	23.6293	23 5/8
15	25.3171	25 5/16
16	27.0049	—
17	28.6927	28 11/16
18	30.3806	30 3/8
19	32.0684	32 1/16
20	33.7562	33 3/4

Unit Definitions

What is a Knot (kn)?

OtherWorldwide (maritime/aviation)

A knot (kn) is a unit of speed equal to one nautical mile per hour, commonly used in maritime and air navigation.

History

The term 'knot' originated from the practice of measuring a ship's speed by counting the knots tied in a rope thrown overboard. Each knot represented a specific distance traveled in a given time.

Current Use

Today, knots are widely used in aviation and maritime contexts to express speed, particularly for vessels and aircraft.

Learn more about Knot

What is a Foot per Second (ft/s)?

ImperialUnited States

A foot per second (ft/s) is a unit of speed expressing the distance traveled in feet in one second.

History

The foot has been used as a measurement for centuries, with the second being a standard unit of time established in the late 19th century. Combining these gives the foot per second as a practical speed measurement.

Current Use

Feet per second is commonly used in various fields, including physics, engineering, and everyday applications like road speed limits.

Learn more about Foot per Second

Frequently Asked Questions

How do knots relate to maritime speed?

Knots are the standard unit for measuring the speed of ships and aircraft. For example, if a boat is traveling at 10 knots, it is moving at approximately 16.8781 feet per second. This conversion is crucial for navigation, as it helps sailors understand how fast they are moving relative to water currents. Knowing this can help determine travel times for long voyages.

Why is converting knots to feet per second useful in aviation?

In aviation, pilots often need to convert knots to feet per second for better comprehension of ascent and descent rates. For instance, if an aircraft is climbing at 200 knots, that translates to about 337.562 feet per second. Understanding this speed helps pilots maintain control and adjust their altitude safely during takeoff and landing.

How can this conversion assist in fitness training?

For runners and cyclists, knowing the speed in feet per second can provide a clearer perspective on performance. If a cyclist is riding at 15 knots, that equals approximately 25.88 feet per second. This conversion allows athletes to track their speed in a familiar unit, helping them set personal records and improve their training efficiency.

How does this conversion apply in construction?

In construction, machinery such as cranes may operate at speeds measured in knots. For example, if a crane moves at 5 knots, it is moving at about 8.68 feet per second. Knowing this conversion aids workers in coordinating the movement of materials and ensuring safety on job sites by understanding the speed of equipment.

How is this relevant in scientific research?

In scientific research, particularly in oceanography, scientists often measure currents in knots. If a current is one knot, that translates to roughly 1.68781 feet per second, which is crucial for studying marine ecosystems. Accurate conversions help researchers predict how organisms will be affected by water movement, making this information vital for environmental studies.

Popular Speed Conversions

Mile per Hour to Kilometer per Hourmph → km/h Kilometer per Hour to Mile per Hourkm/h → mph Meter per Second to Kilometer per Hourm/s → km/h Knot to Kilometer per Hourkn → km/h Knot to Mile per Hourkn → mph Mile per Hour to Meter per Secondmph → m/s

Convert Knot to Other Units

Knot to Meter per Second→ m/s Knot to Kilometer per Hour→ km/h Knot to Mile per Hour→ mph Knot to Meter per Second→ m/s Knot to Mach→ M Knot to Speed of Light→ c Knot to Foot per Second→ ft/s Knot to Mach→ M

Related Conversions

Meter per Second to Knotm/s → kn Meter per Second to Foot per Secondm/s → ft/s Kilometer per Hour to Knotkm/h → kn Kilometer per Hour to Foot per Secondkm/h → ft/s Mile per Hour to Knotmph → kn