Convert 9 kn to fps

How to convert knots to feet per second

1. Formula: feet per second = knots × 1.68781
2. Put in the value: 9 knots.
3. Result: 15.190289 feet per second.

Knots to feet per second table

Converting the other way: feet per second to knots

knots = feet per second × 0.5924838. So 15.190289 feet per second is back to 9 knots; one foot per second is 0.5924838 knots. See the feet per second to knots table.

Quick estimate in your head

For a rough answer, multiply by about 1.7: 9 × 1.7 ≈ 15.3 fps, against the exact 15.190289 fps (0.7% out). Good enough to check that a calculated result is sensible.

Common mistakes

The usual slip is using the factor the wrong way round. A knot is bigger than a foot per second, so the number of feet per second must come out larger than the number of knots. If your answer goes the other way, divide instead of multiplying.

About the units

Knot (kn) and foot per second (fps) are both units of speed. One knot equals 1.68781 feet per second, and one foot per second equals 0.5924838 knots. Results on this page are rounded for display; the conversion itself uses the exact definitions.

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

9 knots in other units

The most readable unit for this amount is meters per second (4.63).

• 4.63 mps
• 16.668 kph
• 10.357015 mph
• 15.190289 fps

How this answer was calculated

The result is worked out from the numbers in this page's address when the page is opened, using exact arithmetic wherever possible and rounding only for display. Nothing is copied from a printed table. If you think an answer is wrong, please tell us through the contact page and we will check it.

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