Knots to Feet per Second
Convert knots to feet per second instantly. 1 kn = 1.6878098571 ft/s. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert knots to feet per second
To convert knots to feet per second, multiply by 1.6878098571. The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
ft/s = kn × 1.6878098571
Knots to Feet per Second conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| Knots | Feet per Second |
|---|---|
| 1 kn | 1.68781 ft/s |
| 2 kn | 3.37562 ft/s |
| 3 kn | 5.06343 ft/s |
| 5 kn | 8.439049 ft/s |
| 10 kn | 16.878099 ft/s |
| 20 kn | 33.756197 ft/s |
| 25 kn | 42.195246 ft/s |
| 50 kn | 84.390493 ft/s |
| 100 kn | 168.780986 ft/s |
| 500 kn | 843.904929 ft/s |
| 1,000 kn | 1,687.81 ft/s |
What is a knot?
One nautical mile per hour, the standard at sea and in the air.
What is a feet per second?
Used for ballistics, airflow and some engineering work.
The formula
ft/s = kn × 1.6878098571
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the Knots to Feet per Second
- Type the number of knots you want to convert.
- Read the result in feet per second straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked feet per second to knots page.
Knots to Feet per Second — frequently asked questions
How many feet per second are in a knot?
One knot equals 1.6878098571 ft/s. ft/s = kn × 1.6878098571
What is the formula to convert knots to feet per second?
The formula is ft/s = kn × 1.6878098571. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert feet per second back to knots?
Divide instead of multiplying: one feet per second is 0.5924838013 kn. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this knots to feet per second free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
What people search for
This page answers each of these searches. They are the exact phrases visitors use to find the knots to feet per second.
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 19, 2026 · Calculation runs client-side · No data collected · Report an error