Feet per Second to Millimeters per Second Converter
Enter the speed in feet per second below to convert it to millimeters per second.
Convert Feet per Second to Millimeters per Second
Enter a value in feet per second (ft/s) to convert to millimeters per second (mm/s).
Feet per Second to Millimeters per Second Conversion Table
Table showing various feet per second measurements converted to millimeters per second. Click any preset value or arrow to load it into the converter.
| Feet per Second (ft/s) | Millimeters per Second (mm/s) |
|---|---|
| 1 ft/s | 304.8 mm/s |
| 2 ft/s | 609.6 mm/s |
| 2.5 ft/s | 762 mm/s |
| 5 ft/s | 1,524 mm/s |
| 10 ft/s | 3,048 mm/s |
| 15 ft/s | 4,572 mm/s |
| 20 ft/s | 6,096 mm/s |
| 25 ft/s | 7,620 mm/s |
| 30 ft/s | 9,144 mm/s |
| 50 ft/s | 15,240 mm/s |
How to Convert Feet per Second to Millimeters per Second
To convert feet per second to millimeters per second, multiply the speed by the following conversion ratio: 304.8 millimeters per second/feet per second.
Since one feet per second is equal to 304.8 millimeters per second, you can use this simple formula to convert:
The speed in millimeters per second is equal to the speed in feet per second multiplied by 304.8.
For example, here's how to convert 5 feet per second to millimeters per second using the formula above.
How Many Millimeters per Second Are in a Feet per Second?
There are 304.8 millimeters per second in a feet per second, which is why we use this value in the formula above.
Our feet per second to millimeters per second calculator automatically converts your speed measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
Feet per Second and millimeters per second are both units used to measure speed. Keep reading to learn more about each unit.
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. [1]
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.
What Is a Millimeters per Second?
A millimeters per second is a unit of speed equal to 1/1,000 of a meters per second (0.001 m/s). 3D printing and CNC speed unit equal to 0.001 m/s. [2]
The millimeters per second is classified as a metric and SI-compatible unit of speed. Millimeters per Second can be abbreviated as mm/s; for example, 1 millimeters per second can be written as 1 mm/s.
In the metric system, "milli" is the standard SI prefix for thousandths, or 10⁻³. This makes the millimeters per second (mm/s) a convenient decimal multiple of the meters per second (m/s).
In practice, millimeters per second (mm/s) are widely used across fine-tolerance laboratory, analytical, and micro-scale speed measurements within SI metric workflows, engineering documentation, and technical data sheets.
When converting speed between feet per second (ft/s) and millimeters per second (mm/s), keep full floating-point precision (1 ft/s = 304.8 mm/s; 1 mm/s = 0.0032808 ft/s) during intermediate calculations and round only the final millimeters per second figure to match your instrument tolerance.
More Feet per Second & Millimeters per Second Conversions
Need to calculate in the opposite direction? Use our millimeters per second to feet per second calculator to switch your starting unit immediately. You can also explore related tools such as converting millimeters per second to feet per second, converting feet per second to miles per hour, or converting miles per hour to kilometers per hour.
Convert from Feet per Second
Frequently Asked Questions
References
- [1]NIST SP 811 StandardNIST SP 811 (NIST SP 811 App. B.9 (Velocity))·Speed Metrology Standard — Feet per Second (ft/s) to Millimeters per Second (mm/s)
- [2]NIST OWM SpecificationNIST OWM (SI Units — Length & Distance)·Unit Specifications: Feet per Second (ft/s) & Millimeters per Second (mm/s)
- [3]NIST CUU ReferenceNIST CUU (SI Coherent Derived Units (m/s))·Conversion Factors & Mathematical Basis (ft/s to mm/s)