Knots to ft/s Converter
Quick answer: To convert knots to ft/s, multiply by 1.68781. For example, 10 kn is 16.8781 ft/s. One knot equals 1.68781 ft/s.
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Use the Knots to ft/s Converter
Knots to ft/s formula and what each symbol means
ft/s = kn × 1.68781
| Symbol | Meaning |
|---|---|
| kn | Knot |
| ft/s | Foot per second |
Knots to ft/s examples
1 kn
1 kn × 1.68781 = 1.68781 ft/s.
10 kn
10 kn × 1.68781 = 16.8781 ft/s.
100 kn
100 kn × 1.68781 = 168.781 ft/s.
Knots compared with ft/s
One kn is 1.688 times as large as one ft/s, so your number gets bigger when you convert knots to ft/s and smaller when you convert back. If the answer is not larger than what you typed, you divided instead of multiplying.
About knots and ft/s
Knot (kn): Nautical miles per hour, exactly 1852/3600 m/s. Foot per second (ft/s): Feet per second, exactly 0.3048 m/s.
Where knots to ft/s conversions are used
Sports results are quoted in m/s, km/h or mph. Wind and weather reports mix m/s, km/h, mph and knots.
How to calculate Knots to ft/s step by step
- Enter the value in kn (the starting unit).
- Multiply by 1.68781, because 1 kn = 1.68781 ft/s.
- The product is the value in ft/s. To go back, divide by 1.68781 or multiply by 0.5924838.
Popular speed conversions
How to read your Knots to ft/s result
Quick estimate: multiply by about 1.7 to get ft/s from knots; this is within 0.8% of the exact factor. To go from km/h to m/s divide by 3.6.
| KNOTS | FT/S |
|---|---|
| 1 | 1.68781 |
| 2 | 3.37562 |
| 5 | 8.439049 |
| 10 | 16.8781 |
| 20 | 33.7562 |
| 50 | 84.39049 |
| 100 | 168.781 |
| 1,000 | 1,687.81 |
ft/s to Knots: quick table
| FT/S | KNOTS |
|---|---|
| 1 | 0.5924838 |
| 5 | 2.962419 |
| 10 | 5.924838 |
| 25 | 14.8121 |
| 50 | 29.62419 |
| 100 | 59.24838 |
| 250 | 148.121 |
| 500 | 296.2419 |
Common mistakes when calculating Knots to ft/s
- Mixing up knots and mph: a knot is about 15% faster than a mile per hour.
- Dividing when you should multiply: from kn to ft/s multiply by 1.68781; from ft/s to kn divide by 1.68781.
Knots to ft/s FAQ
How many ft/s are in 1 kn?
1 kn equals 1.68781 ft/s.
How many kn are in 1 ft/s?
1 ft/s equals 0.5924838 kn.
Is 1 kn = 1.68781 ft/s an exact conversion?
Yes. The knot and the foot per second are both defined exactly in SI terms, so the ratio has no measurement uncertainty; 1.68781 is just that ratio shown to 7 significant figures.
What is a foot per second (ft/s)?
Feet per second, exactly 0.3048 m/s.
How can I estimate knots to ft/s in my head?
Quick estimate: multiply by about 1.7 to get ft/s from knots; this is within 0.8% of the exact factor.
What is 0.5 kn in ft/s?
0.5 kn = 0.8439049 ft/s (since 0.5 × 1.68781).
What is 25 kn in ft/s?
25 kn = 42.19525 ft/s (since 25 × 1.68781).
What is 80 kn in ft/s?
80 kn = 135.0248 ft/s (since 80 × 1.68781).
How many decimals should I keep when converting kn to ft/s?
Match the precision of your original measurement. For example, 16.8781 ft/s rounds to 16.9 ft/s at 3 significant figures; keep more digits only for engineering or scientific work.
More in Speed converters
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- km/h to Knots Converter
- m/s to ft/s Converter
- km/h to ft/s Converter
- m/s to km/h Converter
- ft/s to MPH Converter
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Method, review and disclaimer
Edited by: Hemant Kumar and Anjita Rai, founders of ToolsVault (SEO and content professional, not a licensed adviser). Method: this tool runs in your browser using the formula shown on this page; the numbers you enter are not sent to our servers. Sources: NIST SP 811, Appendix B.8: conversion factors