To convert feet per second to kmh, multiply by 1.09728.
The calculation uses 1 ft/s = 1.09728 km/h. Results are displayed to at most 10 significant digits. Definitions can be exact while a displayed decimal is rounded. Match the displayed precision to your original measurement.
The formula
value in km/h = value in ft/s × 1.09728
ft/s- Input unit: feet per second
km/h- Output unit: kmh
How to use this calculator
- Enter a value in ft/s.
- Multiply by the stored conversion factor.
- Read the result in km/h; divide by the same factor to convert back.
Worked examples
Worked conversion
1 ft/s × 1.09728 ≈ 1.09728 km/h.
Reverse conversion
1.09728 km/h ÷ 1.09728 ≈ 1 ft/s. Rounding intermediate values can change the last displayed digit.
Frequently asked questions
What factor does this converter use?
It uses 1.09728 km/h per ft/s.
Why can another converter show a slightly different answer?
Check the unit convention first (such as US versus Imperial or decimal versus binary), then compare rounding. Measurement uncertainty is separate from the unit conversion.
ft/s to km/h table
| ft/s | km/h (rounded) |
|---|---|
| 0 | 0 |
| 1 | 1.09728 |
| 2 | 2.19456 |
| 5 | 5.4864 |
| 10 | 10.9728 |
| 100 | 109.728 |
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