Online Converter
Convert Knot to Foot per Second
Conversion Formula
ft/s = kn × 1.6878098571 kn in every speed unit
Tap a unit to make it the target of the converter above.
Conversion factors
ft/s = kn × 1.687809857Using this converter
How to use
- 1
Enter a value
Type a number into the From box. It starts at 1 so you can see the basic ratio straight away. Thousands separators such as 1,250.5 are accepted.
- 2
Choose your units
This page opens with its own units selected. Use either dropdown to pick any other unit in the category, or tap a unit in the all-units list to make it the target.
- 3
Read the result
The answer updates as you type and the matching formula is shown underneath. There is no Convert button to press.
- 4
Swap, copy or clear
Swap reverses the direction, Copy Result copies a line such as 1 km = 0.621371 mi, and Clear empties the input so you can start again.
Supported input formats
Input
- SupportedWhole numbers
25 - SupportedDecimal numbers
2.75Use a dot as the decimal separator.
- SupportedNegative numbers
-40Calculated for every unit. Quantities such as length or weight are normally positive, while temperatures can be negative.
- SupportedThousands separators
1,250.5Commas must group digits in threes. 1,234 is read as one thousand two hundred thirty-four.
- SupportedScientific notation
1.5e6Useful for very large or very small values (1.5e6 = 1,500,000).
- Not supportedComma as decimal mark
2,5Type 2.5 instead.
- Not supportedFractions
1/2Type 0.5 instead.
- Not supportedNumbers with unit text
5 kmEnter only the number and choose the unit from the dropdown.
Output
Results use US English formatting (1,234.56) and show up to 6 decimal places with trailing zeros removed. Very small results appear in scientific notation, such as 9.0949e-13, instead of rounding to zero.
Units available in this converter
- Meter per Second (m/s)
- Kilometer per Hour (km/h)
- Mile per Hour (mph)
- Foot per Second (ft/s)
- Knot (kn)
Quick reference tables
Common values for the units currently selected above, in both directions.
| kn | ft/s |
|---|---|
| 1 | 1.68781 |
| 5 | 8.439049 |
| 10 | 16.878099 |
| 25 | 42.195246 |
| 50 | 84.390493 |
| 100 | 168.780986 |
| 500 | 843.904929 |
| 1,000 | 1,687.809857 |
| ft/s | kn |
|---|---|
| 1 | 0.592484 |
| 5 | 2.962419 |
| 10 | 5.924838 |
| 25 | 14.812095 |
| 50 | 29.62419 |
| 100 | 59.24838 |
| 500 | 296.241901 |
| 1,000 | 592.483801 |
Limitations
- Mph uses the statute mile and the knot equals one nautical mile per hour.
- Mach number is not supported because it depends on altitude and air temperature.
- Results show up to 6 decimal places. Values are not rounded during calculation, and a non-zero result that would display as 0 is shown in scientific notation.
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