Kilometers per Second to Feet per Second Converter
Enter the speed in kilometers per second below to convert it to feet per second.
Convert Kilometers per Second to Feet per Second
Enter a value in kilometers per second (km/s) to convert to feet per second (ft/s).
Kilometers per Second to Feet per Second Conversion Table
Table showing various kilometers per second measurements converted to feet per second. Click any preset value or arrow to load it into the converter.
| Kilometers per Second (km/s) | Feet per Second (ft/s) |
|---|---|
| 1 km/s | 3,280.839895 ft/s |
| 2 km/s | 6,561.67979 ft/s |
| 2.5 km/s | 8,202.0997375 ft/s |
| 5 km/s | 16,404.1994751 ft/s |
| 10 km/s | 32,808.3989501 ft/s |
| 15 km/s | 49,212.5984252 ft/s |
| 20 km/s | 65,616.7979003 ft/s |
| 25 km/s | 82,020.9973753 ft/s |
| 30 km/s | 98,425.1968504 ft/s |
| 50 km/s | 164,041.9947507 ft/s |
How to Convert Kilometers per Second to Feet per Second
To convert kilometers per second to feet per second, multiply the speed by the following conversion ratio: 3,280.839895 feet per second/kilometers per second.
Since one kilometers per second is equal to 3,280.839895 feet per second, you can use this simple formula to convert:
The speed in feet per second is equal to the speed in kilometers per second multiplied by 3,280.839895.
For example, here's how to convert 5 kilometers per second to feet per second using the formula above.
How Many Feet per Second Are in a Kilometers per Second?
There are 3,280.839895 feet per second in a kilometers per second, which is why we use this value in the formula above.
Our kilometers per second to feet per second calculator automatically converts your speed measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Kilometers per Second and feet per second are both units used to measure speed. Keep reading to learn more about each unit.
What Is a Kilometers per Second?
A kilometers per second is a unit of speed equal to 1,000 meters per second (m/s), the base unit for speed. Astrophysics & orbital velocity unit equal to 1,000 m/s. [1]
The kilometers per second is classified as an International System of Units (SI) unit of speed. Kilometers per Second can be abbreviated as km/s; for example, 1 kilometers per second can be written as 1 km/s.
In the metric system, "kilo" is the standard SI prefix for thousands, or 10³. This makes the kilometers per second (km/s) a convenient decimal multiple of the meters per second (m/s).
In practice, kilometers per second (km/s) are widely used across large-scale industrial, bulk, and macro-level speed specifications within International System of Units (SI) workflows, engineering documentation, and technical data sheets.
What Is a Feet per Second?
A feet per second is a unit of speed equal to 0.3048 meters per second (m/s), the base unit for speed. Equal to 0.3048 m/s. [2]
The feet per second is classified as a US customary and imperial unit of speed. Feet per Second can be abbreviated as ft/s; for example, 1 feet per second can be written as 1 ft/s.
When working with feet per second (ft/s) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, feet per second (ft/s) are widely used across standard speed applications within US customary and imperial workflows, engineering documentation, and technical data sheets.
When converting speed between kilometers per second (km/s) and feet per second (ft/s), keep full floating-point precision (1 km/s = 3,280.839895 ft/s; 1 ft/s = 0.0003048 km/s) during intermediate calculations and round only the final feet per second figure to match your instrument tolerance.
More Kilometers per Second & Feet per Second Conversions
Need to calculate in the opposite direction? Use our feet per second to kilometers per second calculator to switch your starting unit immediately. You can also explore related tools such as converting feet per second to kilometers per second, converting miles per hour to feet per second, or converting miles per hour to kilometers per hour.
Convert from Kilometers per Second
Frequently Asked Questions
References
- [1]NIST SP 811 StandardNIST SP 811 (NIST SP 811 App. B.9 (Velocity))·Speed Metrology Standard — Kilometers per Second (km/s) to Feet per Second (ft/s)
- [2]NIST OWM SpecificationNIST OWM (SI Units — Length & Distance)·Unit Specifications: Kilometers per Second (km/s) & Feet per Second (ft/s)
- [3]NIST CUU ReferenceNIST CUU (SI Coherent Derived Units (m/s))·Conversion Factors & Mathematical Basis (km/s to ft/s)