Distance divided by time.
Centimeter per Hours to Millimeter per Days Converter — cm/h to mm/d
Convert Centimeter per Hours (cm/h) to Millimeter per Days (mm/d) using the exact conversion factor (1 centimeter per hours = 240 millimeter per days). See the formula, worked examples, and conversion table.
Centimeter per Hours to Millimeter 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 2.77777778e-6 / 1.15740741e-8.
Speed uses meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Centimeter per Hours to Millimeter per Days
Centimeter per Hours and Millimeter 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
millimeter per days = centimeter per hours × 240
This factor comes from each unit's defined relationship to the category's base unit: 1 centimeter per hours equals 0.00000277777777778 base units, and 1 millimeter per days equals 1.157407e-8 base units, so dividing one by the other gives the direct centimeter per hours-to-millimeter per days factor of 240.
Simple example
1 cm/h × 240 = 240 mm/d
1 centimeter per hours = 240 millimeter per days.
Real-world example
10 cm/h × 240 = 2,400 mm/d
10 centimeter per hours = 2,400 millimeter per days.
Conversion table
| Centimeter per Hours (cm/h) | Millimeter per Days (mm/d) |
|---|---|
| 1 cm/h | 240 mm/d |
| 5 cm/h | 1,200 mm/d |
| 10 cm/h | 2,400 mm/d |
| 25 cm/h | 6,000 mm/d |
| 50 cm/h | 12,000 mm/d |
| 100 cm/h | 24,000 mm/d |
Reverse conversion: Millimeter per Days to Centimeter per Hours
240 mm/d × 0.004166666667 = 1 cm/h
240 millimeter per days = 1 centimeter per hours.
centimeter per hours = millimeter per days × 0.00416666666667
For a page dedicated to this direction, see Millimeter per Days to Centimeter per Hours.
Understanding the Centimeter per Hours (cm/h)
Distance divided by time.
Understanding the Millimeter per Days (mm/d)
Distance divided by time.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many millimeter per days are in 1 centimeter per hours?
1 centimeter per hours equals 240 millimeter per days, using the exact defined conversion factor rather than an estimate.
How do I convert centimeter per hours to millimeter per days?
Multiply the centimeter per hours value by 240. The converter above does this instantly to whatever precision you set.
How do I convert millimeter per days back to centimeter per hours?
Use the reverse factor: 1 millimeter per days equals 0.0041666667 centimeter per hours. You can also use the swap control in the converter above to flip the direction instantly.
What is a centimeter per hours?
Centimeter per Hours (cm/h) is a unit of speed.
What is a millimeter per days?
Millimeter per Days (mm/d) is a unit of speed.
Is the centimeter per hours to millimeter per days conversion exact?
Yes. Both centimeter per hours and millimeter per days are defined by fixed standards rather than physical artifacts, so the factor of 240 used above is exact to as many digits as you choose to display.