Kilometers per Hour to Feet per Second (km/h to ft/s)
1 kilometer per hour (km/h) = 0.9113444153 feet per second (ft/s). 1 ft/s = 1.09728 km/h. Example: 15 km/h = 15 × 0.9113444153 = 13.67016623 ft/s.
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1 km/h = 0.9113444153 ft/s
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk kilometer per hour to foot per second converter to paste a column from Excel.
How to Convert Kilometer per Hour to Foot per Second
- 1 km/h = 0.9113444153 ft/s
- 1 ft/s = 1.09728 km/h
- Example: convert 15 km/h to ft/s: 15 km/h = 15 × 0.9113444153 ft/s = 13.67016623 ft/s
Formula
ft/s = km/h × 0.9113444152814
or ft/s = km/h ÷ 1.09728
Derivation from SI units:
- 1 km/h = 1000 m ÷ 3600 s = 1/3.6 m/s exactly.
- 1 ft/s = 0.3048 m/s exactly.
- 1 km/h = 0.2777777777778 m/s ÷ 0.3048 m/s per ft/s = 0.9113444152814 ft/s
Both units are defined exactly, so the factor is exact. Kilometer per Hour definition: kilometer per hour; Foot per Second definition: foot per second.
Worked examples
- A reading of 50 km/h converts to 45.56722076 ft/s.
50 km/h × 0.9113444153 = 45.56722076 ft/s - A value of 100 km/h is 91.13444153 ft/s.
100 km/h × 0.9113444153 = 91.13444153 ft/s
Kilometer per Hour to Foot per Second conversion table
| Kilometers per Hour (km/h) | Feet per Second (ft/s) |
|---|---|
| 10 km/h | 9.113444153 ft/s |
| 30 km/h | 27.34033246 ft/s |
| 40 km/h | 36.45377661 ft/s |
| 50 km/h | 45.56722076 ft/s |
| 60 km/h | 54.68066492 ft/s |
| 80 km/h | 72.90755322 ft/s |
| 90 km/h | 82.02099738 ft/s |
| 100 km/h | 91.13444153 ft/s |
| 110 km/h | 100.2478857 ft/s |
| 120 km/h | 109.3613298 ft/s |
| 130 km/h | 118.474774 ft/s |
Where it's used
Kilometers per Hour are used for road speed limits and car speedometers, while feet per second appear in muzzle velocity and ballistics. Both measure speed (distance per time), so the conversion is a fixed factor.
Kilometer per Hour to other speed units
| Conversion | 1 km/h equals |
|---|---|
| kilometer per hour to foot per second | 0.9113444153 ft/s |
| kilometer per hour to meter per second | 0.2777777778 m/s |
| kilometer per hour to mile per hour | 0.6213711922 mph |
| kilometer per hour to knot | 0.5399568035 kn |
Frequently asked questions
How many feet per second are in 1 kilometer per hour?
1 km/h = 0.9113444153 ft/s.
How do I convert kilometers per hour to feet per second?
Multiply the value in km/h by 0.9113444153, or divide it by 1.09728. For example, 15 km/h × 0.9113444153 = 13.67016623 ft/s.
Is the km/h to ft/s conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (radian) and Table 8 (non-SI units accepted for use with the SI).
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "foot per second".
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Kilometers per Hour to Feet per Second (km/h to ft/s). Retrieved October 25, 2026, from https://scientificconverters.com/speed/kilometers-per-hour-to-feet-per-second/
IEEE
Scientific Converters, "Kilometers per Hour to Feet per Second (km/h to ft/s)," scientificconverters.com. Accessed: Oct. 25, 2026. [Online]. Available: https://scientificconverters.com/speed/kilometers-per-hour-to-feet-per-second/