Distance divided by time.
Centimeter per Hours to mph Converter — cm/h to mph
Convert Centimeter per Hours (cm/h) to mph (mph) using the exact conversion factor (1 centimeter per hours = 0.0000062137 mph). See the formula, worked examples, conversion table, history, and common uses.
Centimeter per Hours to mph 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.
Miles per hour.
Result = input x 2.77777778e-6 / 0.44704.
Speed uses meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Centimeter per Hours to mph
Centimeter per Hours and mph both describe speed, and the conversion matters whenever a maritime or aviation speed (knots) needs to be compared against a road speed (mph). Specifically: Distance divided by time, and miles per hour.
Formula
mph = centimeter per hours × 0.00000621371192237
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 mph equals 0.44704 base units, so dividing one by the other gives the direct centimeter per hours-to-mph factor of 0.00000621371192237.
Simple example
1 cm/h × 0.000006213711922 = 0.0000062137 mph
1 centimeter per hours = 0.0000062137 mph.
Real-world example
10 cm/h × 0.000006213711922 = 0.0000621371 mph
10 centimeter per hours = 0.0000621371 mph.
Conversion table
| Centimeter per Hours (cm/h) | mph (mph) |
|---|---|
| 1 cm/h | 0.0000062137 mph |
| 5 cm/h | 0.0000310686 mph |
| 10 cm/h | 0.0000621371 mph |
| 25 cm/h | 0.0001553428 mph |
| 50 cm/h | 0.0003106856 mph |
| 100 cm/h | 0.0006213712 mph |
Reverse conversion: mph to Centimeter per Hours
0.0000062137 mph × 160934.4 = 0.9999980813 cm/h
0.0000062137 mph = 0.9999980813 centimeter per hours.
centimeter per hours = mph × 160934.4
For a page dedicated to this direction, see mph to Centimeter per Hours.
Understanding the Centimeter per Hours (cm/h)
Distance divided by time.
Understanding the mph
mph (mph) measures speed. Miles per hour follows directly from the international statute mile (1,609.344 m) divided by one hour. It is classified as a US/imperial customary unit.
Where it's used: United States (road speed limits and vehicle speedometers) United Kingdom (road speed limits)
Uses of the mph today
- Road speed limits and vehicle speedometers in the US and UK
- Weather reporting (wind speed) in the US
- Sports statistics (e.g. pitch speed, wind gusts) in US media
History of the mph
Miles per hour is a compound unit with no separate origin story of its own — it follows automatically once the statute mile was fixed at 5,280 feet in 1593 and later refined to exactly 1,609.344 meters by the 1959 international agreement that also standardized the pound.
Historical origin. mph was not the invention of a single named person; it developed through the process described above.
mph — sources
- NIST — International yard and pound (1959) — Basis for the modern mile used in mph.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many mph are in 1 centimeter per hours?
1 centimeter per hours equals 0.0000062137 mph, using the exact defined conversion factor rather than an estimate.
How do I convert centimeter per hours to mph?
Multiply the centimeter per hours value by 0.000006213711922. The converter above does this instantly to whatever precision you set.
How do I convert mph back to centimeter per hours?
Use the reverse factor: 1 mph equals 160,934.4 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 mph?
mph (mph) measures speed. Miles per hour follows directly from the international statute mile (1,609.344 m) divided by one hour. It is classified as a US/imperial customary unit.
Is the centimeter per hours to mph conversion exact?
Yes. Both centimeter per hours and mph are defined by fixed standards rather than physical artifacts, so the factor of 0.000006213711922 used above is exact to as many digits as you choose to display.