Distance divided by time.
Foot per Hours to Millimeter per Hours Converter — ft/h to mm/h
Convert Foot per Hours (ft/h) to Millimeter per Hours (mm/h) using the exact conversion factor (1 foot per hours = 304.8 millimeter per hours). See the formula, worked examples, and conversion table.
Foot per Hours to Millimeter per Hours 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 / 2.77777778e-7.
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 Hours
Foot per Hours and Millimeter per Hours 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 hours = foot per hours × 304.8
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 hours equals 2.777778e-7 base units, so dividing one by the other gives the direct foot per hours-to-millimeter per hours factor of 304.8.
Simple example
1 ft/h × 304.8 = 304.8 mm/h
1 foot per hours = 304.8 millimeter per hours.
Real-world example
10 ft/h × 304.8 = 3,048 mm/h
10 foot per hours = 3,048 millimeter per hours.
Conversion table
| Foot per Hours (ft/h) | Millimeter per Hours (mm/h) |
|---|---|
| 1 ft/h | 304.8 mm/h |
| 5 ft/h | 1,524 mm/h |
| 10 ft/h | 3,048 mm/h |
| 25 ft/h | 7,620 mm/h |
| 50 ft/h | 15,240 mm/h |
| 100 ft/h | 30,480 mm/h |
Reverse conversion: Millimeter per Hours to Foot per Hours
304.8 mm/h × 0.003280839895 = 1 ft/h
304.8 millimeter per hours = 1 foot per hours.
foot per hours = millimeter per hours × 0.00328083989501
For a page dedicated to this direction, see Millimeter per Hours to Foot per Hours.
Understanding the Foot per Hours (ft/h)
Distance divided by time.
Understanding the Millimeter per Hours (mm/h)
Distance divided by time.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many millimeter per hours are in 1 foot per hours?
1 foot per hours equals 304.8 millimeter per hours, using the exact defined conversion factor rather than an estimate.
How do I convert foot per hours to millimeter per hours?
Multiply the foot per hours value by 304.8. The converter above does this instantly to whatever precision you set.
How do I convert millimeter per hours back to foot per hours?
Use the reverse factor: 1 millimeter per hours equals 0.0032808399 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 hours?
Millimeter per Hours (mm/h) is a unit of speed.
Is the foot per hours to millimeter per hours conversion exact?
Yes. Both foot per hours and millimeter per hours 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.