Distance divided by time.
Millimeter per Days to Foot per Days Converter — mm/d to ft/d
Convert Millimeter per Days (mm/d) to Foot per Days (ft/d) using the exact conversion factor (1 millimeter per days = 0.0032808399 foot per days). See the formula, worked examples, and conversion table.
Millimeter per Days to Foot per Days 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 1.15740741e-8 / 3.52777778e-6.
Speed uses meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Millimeter per Days to Foot per Days
Millimeter per Days and Foot per Days 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
foot per days = millimeter per days × 0.00328083989501
This factor comes from each unit's defined relationship to the category's base unit: 1 millimeter per days equals 1.157407e-8 base units, and 1 foot per days equals 0.00000352777777778 base units, so dividing one by the other gives the direct millimeter per days-to-foot per days factor of 0.00328083989501.
Simple example
1 mm/d × 0.003280839895 = 0.0032808399 ft/d
1 millimeter per days = 0.0032808399 foot per days.
Real-world example
10 mm/d × 0.003280839895 = 0.032808399 ft/d
10 millimeter per days = 0.032808399 foot per days.
Conversion table
| Millimeter per Days (mm/d) | Foot per Days (ft/d) |
|---|---|
| 1 mm/d | 0.0032808399 ft/d |
| 5 mm/d | 0.0164041995 ft/d |
| 10 mm/d | 0.032808399 ft/d |
| 25 mm/d | 0.0820209974 ft/d |
| 50 mm/d | 0.1640419948 ft/d |
| 100 mm/d | 0.3280839895 ft/d |
Reverse conversion: Foot per Days to Millimeter per Days
0.0032808399 ft/d × 304.8 = 1.000000002 mm/d
0.0032808399 foot per days = 1.000000002 millimeter per days.
millimeter per days = foot per days × 304.8
For a page dedicated to this direction, see Foot per Days to Millimeter per Days.
Understanding the Millimeter per Days (mm/d)
Distance divided by time.
Understanding the Foot per Days (ft/d)
Distance divided by time.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many foot per days are in 1 millimeter per days?
1 millimeter per days equals 0.0032808399 foot per days, using the exact defined conversion factor rather than an estimate.
How do I convert millimeter per days to foot per days?
Multiply the millimeter per days value by 0.003280839895. The converter above does this instantly to whatever precision you set.
How do I convert foot per days back to millimeter per days?
Use the reverse factor: 1 foot per days equals 304.8 millimeter per days. You can also use the swap control in the converter above to flip the direction instantly.
What is a millimeter per days?
Millimeter per Days (mm/d) is a unit of speed.
What is a foot per days?
Foot per Days (ft/d) is a unit of speed.
Is the millimeter per days to foot per days conversion exact?
Yes. Both millimeter per days and foot per days are defined by fixed standards rather than physical artifacts, so the factor of 0.003280839895 used above is exact to as many digits as you choose to display.