Distance divided by time.
Foot per Hours to Millimeter per Seconds Converter — ft/h to mm/s
Convert Foot per Hours (ft/h) to Millimeter per Seconds (mm/s) using the exact conversion factor (1 foot per hours = 0.0846666667 millimeter per seconds). See the formula, worked examples, and conversion table.
Foot per Hours 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 8.46666667e-5 / 0.001.
Speed uses meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Foot per Hours to Millimeter per Seconds
Foot per Hours 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). Both are distance divided by time units.
Formula
millimeter per seconds = foot per hours × 0.0846666666667
This factor comes from each unit's defined relationship to the category's base unit: 1 foot per hours equals 0.0000846666666667 base units, and 1 millimeter per seconds equals 0.001 base units, so dividing one by the other gives the direct foot per hours-to-millimeter per seconds factor of 0.0846666666667.
Simple example
1 ft/h × 0.08466666667 = 0.0846666667 mm/s
1 foot per hours = 0.0846666667 millimeter per seconds.
Real-world example
10 ft/h × 0.08466666667 = 0.8466666667 mm/s
10 foot per hours = 0.8466666667 millimeter per seconds.
Conversion table
| Foot per Hours (ft/h) | Millimeter per Seconds (mm/s) |
|---|---|
| 1 ft/h | 0.0846666667 mm/s |
| 5 ft/h | 0.4233333333 mm/s |
| 10 ft/h | 0.8466666667 mm/s |
| 25 ft/h | 2.116666667 mm/s |
| 50 ft/h | 4.233333333 mm/s |
| 100 ft/h | 8.466666667 mm/s |
Reverse conversion: Millimeter per Seconds to Foot per Hours
0.0846666667 mm/s × 11.81102362 = 1 ft/h
0.0846666667 millimeter per seconds = 1 foot per hours.
foot per hours = millimeter per seconds × 11.811023622
For a page dedicated to this direction, see Millimeter per Seconds to Foot per Hours.
Understanding the Foot per Hours (ft/h)
Distance divided by time.
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 foot per hours?
1 foot per hours equals 0.0846666667 millimeter per seconds, using the exact defined conversion factor rather than an estimate.
How do I convert foot per hours to millimeter per seconds?
Multiply the foot per hours value by 0.08466666667. The converter above does this instantly to whatever precision you set.
How do I convert millimeter per seconds back to foot per hours?
Use the reverse factor: 1 millimeter per seconds equals 11.81102362 foot per hours. You can also use the swap control in the converter above to flip the direction instantly.
What is a foot per hours?
Foot per Hours (ft/h) is a unit of speed.
What is a millimeter per seconds?
Millimeter per Seconds (mm/s) is a unit of speed.
Is the foot per hours to millimeter per seconds conversion exact?
Yes. Both foot per hours and millimeter per seconds are defined by fixed standards rather than physical artifacts, so the factor of 0.08466666667 used above is exact to as many digits as you choose to display.