Distance divided by time.
Centimeter per Hours to Millimeter per Hours Converter — cm/h to mm/h
Convert Centimeter per Hours (cm/h) to Millimeter per Hours (mm/h) using the exact conversion factor (1 centimeter per hours = 10 millimeter per hours). See the formula, worked examples, and conversion table.
Centimeter 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 2.77777778e-6 / 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 Hours to Millimeter per Hours
Centimeter 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 = centimeter per hours × 10
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 hours equals 2.777778e-7 base units, so dividing one by the other gives the direct centimeter per hours-to-millimeter per hours factor of 10.
Simple example
1 cm/h × 10 = 10 mm/h
1 centimeter per hours = 10 millimeter per hours.
Real-world example
10 cm/h × 10 = 100 mm/h
10 centimeter per hours = 100 millimeter per hours.
Conversion table
| Centimeter per Hours (cm/h) | Millimeter per Hours (mm/h) |
|---|---|
| 1 cm/h | 10 mm/h |
| 5 cm/h | 50 mm/h |
| 10 cm/h | 100 mm/h |
| 25 cm/h | 250 mm/h |
| 50 cm/h | 500 mm/h |
| 100 cm/h | 1,000 mm/h |
Reverse conversion: Millimeter per Hours to Centimeter per Hours
10 mm/h × 0.1 = 1 cm/h
10 millimeter per hours = 1 centimeter per hours.
centimeter per hours = millimeter per hours × 0.1
For a page dedicated to this direction, see Millimeter per Hours to Centimeter per Hours.
Understanding the Centimeter per Hours (cm/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 centimeter per hours?
1 centimeter per hours equals 10 millimeter per hours, using the exact defined conversion factor rather than an estimate.
How do I convert centimeter per hours to millimeter per hours?
Multiply the centimeter per hours value by 10. The converter above does this instantly to whatever precision you set.
How do I convert millimeter per hours back to centimeter per hours?
Use the reverse factor: 1 millimeter per hours equals 0.1 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 hours?
Millimeter per Hours (mm/h) is a unit of speed.
Is the centimeter per hours to millimeter per hours conversion exact?
Yes. Both centimeter per hours and millimeter per hours are defined by fixed standards rather than physical artifacts, so the factor of 10 used above is exact to as many digits as you choose to display.