Feet per second.
ft/s to Millimeter per Seconds Converter — ft/s to mm/s
Convert ft/s (ft/s) to Millimeter per Seconds (mm/s) using the exact conversion factor (1 ft/s = 304.8 millimeter per seconds). See the formula, worked examples, and conversion table.
ft/s to Millimeter per Seconds 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.
Distance divided by time.
Result = input x 0.3048 / 0.001.
Speed uses meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting ft/s to Millimeter per Seconds
ft/s and Millimeter per Seconds both describe speed, and the conversion matters whenever a maritime or aviation speed (knots) needs to be compared against a road speed (mph). Specifically: Feet per second, and distance divided by time.
Formula
millimeter per seconds = ft/s × 304.8
This factor comes from each unit's defined relationship to the category's base unit: 1 ft/s equals 0.3048 base units, and 1 millimeter per seconds equals 0.001 base units, so dividing one by the other gives the direct ft/s-to-millimeter per seconds factor of 304.8.
Simple example
1 ft/s × 304.8 = 304.8 mm/s
1 ft/s = 304.8 millimeter per seconds.
Real-world example
10 ft/s × 304.8 = 3,048 mm/s
10 ft/s = 3,048 millimeter per seconds.
Conversion table
| ft/s (ft/s) | Millimeter per Seconds (mm/s) |
|---|---|
| 1 ft/s | 304.8 mm/s |
| 5 ft/s | 1,524 mm/s |
| 10 ft/s | 3,048 mm/s |
| 25 ft/s | 7,620 mm/s |
| 50 ft/s | 15,240 mm/s |
| 100 ft/s | 30,480 mm/s |
Reverse conversion: Millimeter per Seconds to ft/s
304.8 mm/s × 0.003280839895 = 1 ft/s
304.8 millimeter per seconds = 1 ft/s.
ft/s = millimeter per seconds × 0.00328083989501
For a page dedicated to this direction, see Millimeter per Seconds to ft/s.
Understanding the ft/s (ft/s)
Feet per second.
Understanding the Millimeter per Seconds (mm/s)
Distance divided by time.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many millimeter per seconds are in 1 ft/s?
1 ft/s equals 304.8 millimeter per seconds, using the exact defined conversion factor rather than an estimate.
How do I convert ft/s to millimeter per seconds?
Multiply the ft/s value by 304.8. The converter above does this instantly to whatever precision you set.
How do I convert millimeter per seconds back to ft/s?
Use the reverse factor: 1 millimeter per seconds equals 0.0032808399 ft/s. You can also use the swap control in the converter above to flip the direction instantly.
What is a ft/s?
ft/s (ft/s) is a unit of speed.
What is a millimeter per seconds?
Millimeter per Seconds (mm/s) is a unit of speed.
Is the ft/s to millimeter per seconds conversion exact?
Yes. Both ft/s and millimeter per seconds are defined by fixed standards rather than physical artifacts, so the factor of 304.8 used above is exact to as many digits as you choose to display.