Distance divided by time.
Foot per Days to Millimeter per Hours Converter — ft/d to mm/h
Convert Foot per Days (ft/d) to Millimeter per Hours (mm/h) using the exact conversion factor (1 foot per days = 12.7 millimeter per hours). See the formula, worked examples, and conversion table.
Foot per Days 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 3.52777778e-6 / 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 Days to Millimeter per Hours
Foot per Days 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 days × 12.7
This factor comes from each unit's defined relationship to the category's base unit: 1 foot per days equals 0.00000352777777778 base units, and 1 millimeter per hours equals 2.777778e-7 base units, so dividing one by the other gives the direct foot per days-to-millimeter per hours factor of 12.7.
Simple example
1 ft/d × 12.7 = 12.7 mm/h
1 foot per days = 12.7 millimeter per hours.
Real-world example
10 ft/d × 12.7 = 127 mm/h
10 foot per days = 127 millimeter per hours.
Conversion table
| Foot per Days (ft/d) | Millimeter per Hours (mm/h) |
|---|---|
| 1 ft/d | 12.7 mm/h |
| 5 ft/d | 63.5 mm/h |
| 10 ft/d | 127 mm/h |
| 25 ft/d | 317.5 mm/h |
| 50 ft/d | 635 mm/h |
| 100 ft/d | 1,270 mm/h |
Reverse conversion: Millimeter per Hours to Foot per Days
12.7 mm/h × 0.07874015748 = 1 ft/d
12.7 millimeter per hours = 1 foot per days.
foot per days = millimeter per hours × 0.0787401574803
For a page dedicated to this direction, see Millimeter per Hours to Foot per Days.
Understanding the Foot per Days (ft/d)
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 days?
1 foot per days equals 12.7 millimeter per hours, using the exact defined conversion factor rather than an estimate.
How do I convert foot per days to millimeter per hours?
Multiply the foot per days value by 12.7. The converter above does this instantly to whatever precision you set.
How do I convert millimeter per hours back to foot per days?
Use the reverse factor: 1 millimeter per hours equals 0.0787401575 foot per days. You can also use the swap control in the converter above to flip the direction instantly.
What is a foot per days?
Foot per Days (ft/d) 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 days to millimeter per hours conversion exact?
Yes. Both foot per days and millimeter per hours are defined by fixed standards rather than physical artifacts, so the factor of 12.7 used above is exact to as many digits as you choose to display.