How do you convert millimeters per second to feet per second?

To convert millimeters per second (mm/s) to feet per second (ft/s), multiply the speed in millimeters per second by 0.00328083 (feet per second = millimeters per second × 0.00328083).

What is 5 millimeters per second in feet per second?

5 millimeters per second (5 mm/s) is equal to 0.0164 feet per second (0.0164 ft/s).

Which is larger, 1 millimeters per second (mm/s) or 1 feet per second (ft/s)?

One feet per second (ft/s) is larger than one millimeters per second (mm/s). Specifically, 1 ft/s equals 304.8 mm/s, while 1 mm/s is 0.00328083 ft/s.

How do I convert back from feet per second (ft/s) to millimeters per second (mm/s)?

To reverse the calculation from ft/s to mm/s, multiply your feet per second value by the inverse factor 304.8 (or divide by 0.00328083). You can also click the Swap button in the tool above to flip directions in one click.

How many decimal places should I round mm/s to ft/s results to?

For everyday comparisons and quick estimates, rounding to 2 decimal places is usually sufficient (for example, 5 mm/s ≈ 0.02 ft/s). For engineering, laboratory, or machining specifications, select 4 or 6 decimals—or Scientific (10ⁿ) mode—in the calculator toolbar above.

Millimeters per Second to Feet per Second Converter

Enter the speed in millimeters per second below to convert it to feet per second.

Feet per Second to Millimeters per Second (ft/s → mm/s)

Convert Millimeters per Second to Feet per Second

Enter a value in millimeters per second (mm/s) to convert to feet per second (ft/s).

Value (mm/s)

From

Result

•

0.016404199feet per second

5 mm/s = 0.016404199 ft/s

Result updates automatically

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Equivalent Measurements Across UnitsFor 5 mm/s

Knots0.00971922 kn

Suggested Conversions

Reference:NIST SP 811 (NIST SP 811 App. B.9 (Velocity))

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Millimeters per Second to Feet per Second Conversion Table

Table showing various millimeters per second measurements converted to feet per second. Click any preset value or arrow to load it into the converter.

Millimeters per Second (mm/s)	Feet per Second (ft/s)
1 mm/s	0.0032808 ft/s
2 mm/s	0.0065617 ft/s
2.5 mm/s	0.0082021 ft/s
5 mm/s	0.0164042 ft/s
10 mm/s	0.0328084 ft/s
15 mm/s	0.0492126 ft/s
20 mm/s	0.0656168 ft/s
25 mm/s	0.082021 ft/s
30 mm/s	0.0984252 ft/s
50 mm/s	0.164042 ft/s

How to Convert Millimeters per Second to Feet per Second

To convert millimeters per second to feet per second, multiply the speed by the following conversion ratio: 0.0032808 feet per second/millimeters per second.

Since one millimeters per second is equal to 0.0032808 feet per second, you can use this simple formula to convert:

feet per second = millimeters per second × 0.0032808

The speed in feet per second is equal to the speed in millimeters per second multiplied by 0.0032808.

For example, here's how to convert 5 millimeters per second to feet per second using the formula above.

feet per second = (5 mm/s × 0.0032808) = 0.0164042 ft/s

How Many Feet per Second Are in a Millimeters per Second?

There are 0.0032808 feet per second in a millimeters per second, which is why we use this value in the formula above.

1 mm/s = 0.0032808 ft/s|1 ft/s = 304.8 mm/s

Our millimeters 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.

Millimeters per Second and feet per second are both units used to measure speed. Keep reading to learn more about each unit.

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. [1]

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.

Learn more about millimeters per second in our Speed Converter.

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.

Learn more about feet per second in our Speed Converter.

When converting speed between millimeters per second (mm/s) and feet per second (ft/s), keep full floating-point precision (1 mm/s = 0.0032808 ft/s; 1 ft/s = 304.8 mm/s) during intermediate calculations and round only the final feet per second figure to match your instrument tolerance.

More Millimeters per Second & Feet per Second Conversions

Need to calculate in the opposite direction? Use our feet per second to millimeters per second calculator to switch your starting unit immediately. You can also explore related tools such as converting feet per second to millimeters per second, converting miles per hour to feet per second, or converting miles per hour to kilometers per hour.

Convert from Millimeters per Second

Convert to Feet per Second

Frequently Asked Questions

There are 0.00328083 feet per second (ft/s) in 1 millimeters per second (mm/s). Conversely, 1 feet per second (ft/s) is equal to 304.8 millimeters per second (mm/s).

Speed Converter

Quick Info

Direct Factor: 1 millimeters per second (mm/s) equals 0.00328083 feet per second (ft/s).
Inverse Factor: 1 feet per second (ft/s) equals 304.8 millimeters per second (mm/s).
Formula: feet per second = millimeters per second ÷ 304.8.
Verified Precision: Anchored to official NIST SP 811 and ISO/IEC 80000 standards.

Units Comparison

Millimeters per Second (mm/s)

3D printing and CNC speed unit equal to 0.001 m/s.

Feet per Second (ft/s)

Equal to 0.3048 m/s.

Meters per Second (m/s)

Coherent SI unit of velocity.

References

[1]NIST SP 811 · NIST SP 811 App. B.9 (Velocity)
Source
[2]NIST OWM · SI Units — Length & Distance
Source
[3]NIST CUU · SI Coherent Derived Units (m/s)
Source

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References

NIST · BIPM · ISO

[1]
NIST SP 811 (NIST SP 811 App. B.9 (Velocity))·Speed Metrology Standard — Millimeters per Second (mm/s) to Feet per Second (ft/s)
NIST SP 811 Standard
[2]
NIST OWM (SI Units — Length & Distance)·Unit Specifications: Millimeters per Second (mm/s) & Feet per Second (ft/s)
NIST OWM Specification
[3]
NIST CUU (SI Coherent Derived Units (m/s))·Conversion Factors & Mathematical Basis (mm/s to ft/s)
NIST CUU Reference

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