Feet per second Converter
Convert Feet per second (ft/s) to any other speed unit. The table below gives the exact figure for each unit, and every conversion is worked from the same engine as the converter.
What feet per second convert to
One ft/s in every other speed unit.
| Unit | 1 ft/s | Reverse |
|---|---|---|
| Meters per second | 0.3048 m/s | 3.28084 ft/s |
| Kilometers per hour | 1.09728 km/h | 0.911344 ft/s |
| Miles per hour | 0.681818 mph | 1.466667 ft/s |
| Knots | 0.592484 kn | 1.68781 ft/s |
Multiply a feet per second figure by the figure in the second column to get the unit in the first, or multiply by the third column to go the other way.
Feet per second conversion reference
Feet per second to Meters per second
One feet per second is 0.3048 meters per second, and one meters per second is 3.28084 feet per second.
The meter per second is the SI unit of speed. It is used in science and engineering, where distances are in meters and time in seconds.
- 1 ft/s= 0.3048 m/s
- 5 ft/s= 1.524 m/s
- 10 ft/s= 3.048 m/s
The meter per second is the SI unit of speed, one meter travelled in one second. One meter per second is exactly 3.6 kilometers per hour, a fixed factor that links the two units.
It is the unit of physics and engineering calculation, of wind and water current measurement, and of athletics, where sprint times and running speeds are reported in meters per second.
Feet per second to Kilometers per hour
One feet per second is 1.09728 kilometers per hour, and one kilometers per hour is 0.911344 feet per second.
A kilometer per hour is 0.277778 meters per second. It is the unit on road signs and vehicle speedometers in Tanzania and most countries.
- 1 ft/s= 1.09728 km/h
- 5 ft/s= 5.4864 km/h
- 10 ft/s= 10.9728 km/h
Kilometers per hour measures how many kilometers are covered in one hour. The relationship with meters per second is exact: 1 m/s is exactly 3.6 km/h, so the two units differ by a fixed factor of 3.6.
The unit appears on road signs and in vehicle speed limit legislation, in wind and weather reports, in cycling and motoring specifications, and in everyday estimates of travel time over a known distance.
Feet per second to Miles per hour
One feet per second is 0.681818 miles per hour, and one miles per hour is 1.466667 feet per second.
A mile per hour is 0.44704 meters per second. It is the road-speed unit in the United States and the United Kingdom, and appears on imported vehicle speedometers.
- 1 ft/s= 0.681818 mph
- 5 ft/s= 3.409091 mph
- 10 ft/s= 6.818182 mph
A mile per hour is one statute mile, exactly 1,609.344 meters, travelled in one hour. Miles per hour and kilometers per hour relate by exactly 1.609344, and one mile per hour is exactly 0.44704 meters per second.
It is used on road signs and in vehicle speed limits, in motoring and tyre specifications, in wind and weather reports, and in aviation and motorsport figures.
Feet per second to Knots
One feet per second is 0.592484 knots, and one knots is 1.68781 feet per second.
A knot is one nautical mile per hour, or 0.514444 meters per second. It is the standard unit for the speed of ships and aircraft.
- 1 ft/s= 0.592484 kn
- 5 ft/s= 2.962419 kn
- 10 ft/s= 5.924838 kn
A knot is exactly one nautical mile per hour, and a nautical mile is exactly 1,852 meters. One knot therefore equals exactly 1.852 kilometers per hour, a ratio that needs no rounding.
The unit belongs to marine and air navigation, where it gives vessel and aircraft speeds, wind reports at sea, and current and tidal stream rates.
What feet per second are used for
A foot per second is 0.3048 meters per second. It is used in aviation, engineering and wind-speed figures in imperial-measure countries.
The 3.6 factor between m/s and km/h is exact, so those two convert losslessly. Knots and miles per hour are exact definitions as well.
Every speed unit is a distance over a time, so the conversion factor is just the distance factor divided by the time factor. Meters per second to kilometers per hour is a single multiplication by exactly 3.6, and a reader can hold that number.
The candidates for confusion are the mile and the nautical mile, because both appear in speed units. A knot is one nautical mile per hour, and a nautical mile is 1,852 meters against the statute mile's 1,609.344, so a knot is about 15% faster than a mile per hour. Treating the two as interchangeable understates a marine or aviation speed.
To check a speed conversion, convert it to meters per second and compare with something known, such as walking pace. The error to avoid is applying the 3.6 factor to a pair that is not m/s to km/h, when the correct move is to convert the distance and the time separately.
Tanzania reference points
Real quantities, converted into feet per second.
The speed limit in built-up areas in Tanzania
50 km/h = 45.567221 ft/s
Source: Road Traffic Act [Cap.168 R.E 2002] s.51, summarised by FB Attorneys · verified 2026-09-14
The maximum speed outside built-up areas for vehicles over 3,500 kg in Tanzania
80 km/h = 72.907553 ft/s
Outside built-up areas the limit for other vehicles is set by posted signs and road markings rather than a single national figure.
Source: Road Traffic Act [Cap.168 R.E 2002] s.51, summarised by FB Attorneys · verified 2026-09-14
Feet per second conversion tables
Feet per second to Meters per second
| Feet per second (ft/s) | Meters per second (m/s) |
|---|---|
| 1 | 0.3048 |
| 2 | 0.6096 |
| 3 | 0.9144 |
| 4 | 1.2192 |
| 5 | 1.524 |
| 10 | 3.048 |
| 25 | 7.62 |
| 50 | 15.24 |
| 100 | 30.48 |
Feet per second to Kilometers per hour
| Feet per second (ft/s) | Kilometers per hour (km/h) |
|---|---|
| 1 | 1.09728 |
| 2 | 2.19456 |
| 3 | 3.29184 |
| 4 | 4.38912 |
| 5 | 5.4864 |
| 10 | 10.9728 |
| 25 | 27.432 |
| 50 | 54.864 |
| 100 | 109.728 |
Feet per second to Miles per hour
| Feet per second (ft/s) | Miles per hour (mph) |
|---|---|
| 1 | 0.681818 |
| 2 | 1.363636 |
| 3 | 2.045455 |
| 4 | 2.727273 |
| 5 | 3.409091 |
| 10 | 6.818182 |
| 25 | 17.045455 |
| 50 | 34.090909 |
| 100 | 68.181818 |