Feet per Second to Kilometers per Second
Convert feet per second to kilometers per second instantly. 1 ft/s = 0.0003048 km/s. Includes the exact factor, a conversion table of common values and the definition of both units.
How to convert feet per second to kilometers per second
To convert feet per second to kilometers per second, divide by 3280.8398950131 (multiply by 0.0003048). The relationship is fixed, so the same factor works for any quantity — there is nothing to look up and nothing that changes with temperature, location or context.
km/s = ft/s × 0.0003048
Feet per Second to Kilometers per Second conversion table
The values people look up most often, rounded for reading. Use the calculator above for anything in between.
| Feet per Second | Kilometers per Second |
|---|---|
| 1 ft/s | 0.0003048 km/s |
| 2 ft/s | 0.0006096 km/s |
| 3 ft/s | 0.0009144 km/s |
| 5 ft/s | 0.001524 km/s |
| 10 ft/s | 0.003048 km/s |
| 20 ft/s | 0.006096 km/s |
| 25 ft/s | 0.00762 km/s |
| 50 ft/s | 0.01524 km/s |
| 100 ft/s | 0.03048 km/s |
| 500 ft/s | 0.1524 km/s |
| 1,000 ft/s | 0.3048 km/s |
What is a feet per second?
Used for ballistics, airflow and some engineering work.
What is a kilometers per second?
The scale of orbital and escape velocities.
The formula
km/s = ft/s × 0.0003048
Every result on this page comes from this formula. Nothing is rounded until the final display, so figures match a spreadsheet to the cent.
How to use the Feet per Second to Kilometers per Second
- Type the number of feet per second you want to convert.
- Read the result in kilometers per second straight away — there is no button to press.
- Check the table below for the values that come up most often, or reverse the conversion with the linked kilometers per second to feet per second page.
Feet per Second to Kilometers per Second — frequently asked questions
How many kilometers per second are in a feet per second?
One feet per second equals 0.0003048 km/s. km/s = ft/s × 0.0003048
What is the formula to convert feet per second to kilometers per second?
The formula is km/s = ft/s × 0.0003048. It is an exact definition rather than an approximation, so the conversion never drifts no matter how large the number.
How do I convert kilometers per second back to feet per second?
Divide instead of multiplying: one kilometers per second is 3280.8398950131 ft/s. The reverse converter is linked in the related tools list.
Is this conversion exact?
Yes. Both units are defined against the same base unit by international agreement, so the factor is exact — any rounding you see is only in the display, which you can widen by entering more decimal places.
Is this feet per second to kilometers per second free to use?
Yes. Every calculator on the site is free, needs no sign-up, and runs entirely in your browser, so your figures never leave your device.
What people search for
This page answers each of these searches. They are the exact phrases visitors use to find the feet per second to kilometers per second.
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About this calculator
Written and reviewed by The Samsung Calculator editorial team. Every calculator is written against a published formula, reviewed against at least one independent reference implementation, and dated when it changes.
Last reviewed August 19, 2026 · Calculation runs client-side · No data collected · Report an error