Distance divided by time.
Centimeter per Hours to Millimeter per Seconds Converter — cm/h to mm/s
Convert Centimeter per Hours (cm/h) to Millimeter per Seconds (mm/s) using the exact conversion factor (1 centimeter per hours = 0.0027777778 millimeter per seconds). See the formula, worked examples, and conversion table.
Centimeter per Hours to Millimeter per Seconds 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 / 0.001.
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 Seconds
Centimeter per Hours and Millimeter per Seconds 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 seconds = centimeter per hours × 0.00277777777778
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 seconds equals 0.001 base units, so dividing one by the other gives the direct centimeter per hours-to-millimeter per seconds factor of 0.00277777777778.
Simple example
1 cm/h × 0.002777777778 = 0.0027777778 mm/s
1 centimeter per hours = 0.0027777778 millimeter per seconds.
Real-world example
10 cm/h × 0.002777777778 = 0.0277777778 mm/s
10 centimeter per hours = 0.0277777778 millimeter per seconds.
Conversion table
| Centimeter per Hours (cm/h) | Millimeter per Seconds (mm/s) |
|---|---|
| 1 cm/h | 0.0027777778 mm/s |
| 5 cm/h | 0.0138888889 mm/s |
| 10 cm/h | 0.0277777778 mm/s |
| 25 cm/h | 0.0694444444 mm/s |
| 50 cm/h | 0.1388888889 mm/s |
| 100 cm/h | 0.2777777778 mm/s |
Reverse conversion: Millimeter per Seconds to Centimeter per Hours
0.0027777778 mm/s × 360 = 1.000000008 cm/h
0.0027777778 millimeter per seconds = 1.000000008 centimeter per hours.
centimeter per hours = millimeter per seconds × 360
For a page dedicated to this direction, see Millimeter per Seconds to Centimeter per Hours.
Understanding the Centimeter per Hours (cm/h)
Distance divided by time.
Understanding the Millimeter per Seconds (mm/s)
Distance divided by time.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many millimeter per seconds are in 1 centimeter per hours?
1 centimeter per hours equals 0.0027777778 millimeter per seconds, using the exact defined conversion factor rather than an estimate.
How do I convert centimeter per hours to millimeter per seconds?
Multiply the centimeter per hours value by 0.002777777778. The converter above does this instantly to whatever precision you set.
How do I convert millimeter per seconds back to centimeter per hours?
Use the reverse factor: 1 millimeter per seconds equals 360 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 seconds?
Millimeter per Seconds (mm/s) is a unit of speed.
Is the centimeter per hours to millimeter per seconds conversion exact?
Yes. Both centimeter per hours and millimeter per seconds are defined by fixed standards rather than physical artifacts, so the factor of 0.002777777778 used above is exact to as many digits as you choose to display.