Distance divided by time.
Centimeter per Days to Millimeter per Hours Converter — cm/d to mm/h
Convert Centimeter per Days (cm/d) to Millimeter per Hours (mm/h) using the exact conversion factor (1 centimeter per days = 0.4166666667 millimeter per hours). See the formula, worked examples, and conversion table.
Centimeter 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 1.15740741e-7 / 2.77777778e-7.
Speed uses meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Centimeter per Days to Millimeter per Hours
Centimeter 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 = centimeter per days × 0.416666666667
This factor comes from each unit's defined relationship to the category's base unit: 1 centimeter per days equals 1.157407e-7 base units, and 1 millimeter per hours equals 2.777778e-7 base units, so dividing one by the other gives the direct centimeter per days-to-millimeter per hours factor of 0.416666666667.
Simple example
1 cm/d × 0.4166666667 = 0.4166666667 mm/h
1 centimeter per days = 0.4166666667 millimeter per hours.
Real-world example
10 cm/d × 0.4166666667 = 4.166666667 mm/h
10 centimeter per days = 4.166666667 millimeter per hours.
Conversion table
| Centimeter per Days (cm/d) | Millimeter per Hours (mm/h) |
|---|---|
| 1 cm/d | 0.4166666667 mm/h |
| 5 cm/d | 2.083333333 mm/h |
| 10 cm/d | 4.166666667 mm/h |
| 25 cm/d | 10.41666667 mm/h |
| 50 cm/d | 20.83333333 mm/h |
| 100 cm/d | 41.66666667 mm/h |
Reverse conversion: Millimeter per Hours to Centimeter per Days
0.4166666667 mm/h × 2.4 = 1 cm/d
0.4166666667 millimeter per hours = 1 centimeter per days.
centimeter per days = millimeter per hours × 2.4
For a page dedicated to this direction, see Millimeter per Hours to Centimeter per Days.
Understanding the Centimeter per Days (cm/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 centimeter per days?
1 centimeter per days equals 0.4166666667 millimeter per hours, using the exact defined conversion factor rather than an estimate.
How do I convert centimeter per days to millimeter per hours?
Multiply the centimeter per days value by 0.4166666667. The converter above does this instantly to whatever precision you set.
How do I convert millimeter per hours back to centimeter per days?
Use the reverse factor: 1 millimeter per hours equals 2.4 centimeter per days. You can also use the swap control in the converter above to flip the direction instantly.
What is a centimeter per days?
Centimeter per Days (cm/d) is a unit of speed.
What is a millimeter per hours?
Millimeter per Hours (mm/h) is a unit of speed.
Is the centimeter per days to millimeter per hours conversion exact?
Yes. Both centimeter per days and millimeter per hours are defined by fixed standards rather than physical artifacts, so the factor of 0.4166666667 used above is exact to as many digits as you choose to display.