Distance divided by time.
Millimeter per Hours to ft/s Converter — mm/h to ft/s
Convert Millimeter per Hours (mm/h) to ft/s (ft/s) using the exact conversion factor (1 millimeter per hours = 9.113444e-7 ft/s). See the formula, worked examples, and conversion table.
Millimeter per Hours to ft/s 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.
Feet per second.
Result = input x 2.77777778e-7 / 0.3048.
Speed uses meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Millimeter per Hours to ft/s
Millimeter per Hours and ft/s both describe speed, and the conversion matters whenever a maritime or aviation speed (knots) needs to be compared against a road speed (mph). Specifically: Distance divided by time, and feet per second.
Formula
ft/s = millimeter per hours × 9.113444e-7
This factor comes from each unit's defined relationship to the category's base unit: 1 millimeter per hours equals 2.777778e-7 base units, and 1 ft/s equals 0.3048 base units, so dividing one by the other gives the direct millimeter per hours-to-ft/s factor of 9.113444e-7.
Simple example
1 mm/h × 9.113444e-7 = 9.113444e-7 ft/s
1 millimeter per hours = 9.113444e-7 ft/s.
Real-world example
10 mm/h × 9.113444e-7 = 0.0000091134 ft/s
10 millimeter per hours = 0.0000091134 ft/s.
Conversion table
| Millimeter per Hours (mm/h) | ft/s (ft/s) |
|---|---|
| 1 mm/h | 9.113444e-7 ft/s |
| 5 mm/h | 0.0000045567 ft/s |
| 10 mm/h | 0.0000091134 ft/s |
| 25 mm/h | 0.0000227836 ft/s |
| 50 mm/h | 0.0000455672 ft/s |
| 100 mm/h | 0.0000911344 ft/s |
Reverse conversion: ft/s to Millimeter per Hours
9.113444e-7 ft/s × 1097280 = 0.9999999832 mm/h
9.113444e-7 ft/s = 0.9999999832 millimeter per hours.
millimeter per hours = ft/s × 1097280
For a page dedicated to this direction, see ft/s to Millimeter per Hours.
Understanding the Millimeter per Hours (mm/h)
Distance divided by time.
Understanding the ft/s (ft/s)
Feet per second.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many ft/s are in 1 millimeter per hours?
1 millimeter per hours equals 9.113444e-7 ft/s, using the exact defined conversion factor rather than an estimate.
How do I convert millimeter per hours to ft/s?
Multiply the millimeter per hours value by 9.113444e-7. The converter above does this instantly to whatever precision you set.
How do I convert ft/s back to millimeter per hours?
Use the reverse factor: 1 ft/s equals 1,097,280 millimeter per hours. You can also use the swap control in the converter above to flip the direction instantly.
What is a millimeter per hours?
Millimeter per Hours (mm/h) is a unit of speed.
What is a ft/s?
ft/s (ft/s) is a unit of speed.
Is the millimeter per hours to ft/s conversion exact?
Yes. Both millimeter per hours and ft/s are defined by fixed standards rather than physical artifacts, so the factor of 9.113444e-7 used above is exact to as many digits as you choose to display.