Distance divided by time.
Kilometer per Seconds to ft/s Converter — km/s to ft/s
Convert Kilometer per Seconds (km/s) to ft/s (ft/s) using the exact conversion factor (1 kilometer per seconds = 3,280.839895 ft/s). See the formula, worked examples, and conversion table.
Kilometer per Seconds to ft/s converter
Converter
Speed Converter
Convert road, aviation, marine, lab, and scientific speed units.
Context values
Some unit families need one extra value for a physically accurate result.
Feet per second.
Result = input x 1000 / 0.3048.
Speed uses meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Kilometer per Seconds to ft/s
Kilometer per Seconds and ft/s both describe speed, and the conversion matters whenever a maritime or aviation speed (knots) needs to be compared against a road speed (mph). Specifically: Distance divided by time, and feet per second.
Formula
ft/s = kilometer per seconds × 3280.83989501
This factor comes from each unit's defined relationship to the category's base unit: 1 kilometer per seconds equals 1000 base units, and 1 ft/s equals 0.3048 base units, so dividing one by the other gives the direct kilometer per seconds-to-ft/s factor of 3280.83989501.
Simple example
1 km/s × 3280.839895 = 3,280.839895 ft/s
1 kilometer per seconds = 3,280.839895 ft/s.
Real-world example
10 km/s × 3280.839895 = 32,808.39895 ft/s
10 kilometer per seconds = 32,808.39895 ft/s.
Conversion table
| Kilometer per Seconds (km/s) | ft/s (ft/s) |
|---|---|
| 1 km/s | 3,280.839895 ft/s |
| 5 km/s | 16,404.19948 ft/s |
| 10 km/s | 32,808.39895 ft/s |
| 25 km/s | 82,020.99738 ft/s |
| 50 km/s | 164,041.9948 ft/s |
| 100 km/s | 328,083.9895 ft/s |
Reverse conversion: ft/s to Kilometer per Seconds
1 ft/s × 0.0003048 = 0.0003048 km/s
1 ft/s = 0.0003048 kilometer per seconds.
kilometer per seconds = ft/s × 0.0003048
For a page dedicated to this direction, see ft/s to Kilometer per Seconds.
Understanding the Kilometer per Seconds (km/s)
Distance divided by time.
Understanding the ft/s (ft/s)
Feet per second.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many ft/s are in 1 kilometer per seconds?
1 kilometer per seconds equals 3,280.839895 ft/s, using the exact defined conversion factor rather than an estimate.
How do I convert kilometer per seconds to ft/s?
Multiply the kilometer per seconds value by 3280.839895. The converter above does this instantly to whatever precision you set.
How do I convert ft/s back to kilometer per seconds?
Use the reverse factor: 1 ft/s equals 0.0003048 kilometer per seconds. You can also use the swap control in the converter above to flip the direction instantly.
What is a kilometer per seconds?
Kilometer per Seconds (km/s) is a unit of speed.
What is a ft/s?
ft/s (ft/s) is a unit of speed.
Is the kilometer per seconds to ft/s conversion exact?
Yes. Both kilometer per seconds and ft/s are defined by fixed standards rather than physical artifacts, so the factor of 3280.839895 used above is exact to as many digits as you choose to display.