Distance divided by time.
Centimeter per Hours to Kilometer per Seconds Converter — cm/h to km/s
Convert Centimeter per Hours (cm/h) to Kilometer per Seconds (km/s) using the exact conversion factor (1 centimeter per hours = 2.777778e-9 kilometer per seconds). See the formula, worked examples, and conversion table.
Centimeter per Hours to Kilometer 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 / 1000.
Speed uses meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Centimeter per Hours to Kilometer per Seconds
Centimeter per Hours and Kilometer 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
kilometer per seconds = centimeter per hours × 2.777778e-9
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 kilometer per seconds equals 1000 base units, so dividing one by the other gives the direct centimeter per hours-to-kilometer per seconds factor of 2.777778e-9.
Simple example
1 cm/h × 2.777778e-9 = 2.777778e-9 km/s
1 centimeter per hours = 2.777778e-9 kilometer per seconds.
Real-world example
10 cm/h × 2.777778e-9 = 2.777778e-8 km/s
10 centimeter per hours = 2.777778e-8 kilometer per seconds.
Conversion table
| Centimeter per Hours (cm/h) | Kilometer per Seconds (km/s) |
|---|---|
| 1 cm/h | 2.777778e-9 km/s |
| 5 cm/h | 1.388889e-8 km/s |
| 10 cm/h | 2.777778e-8 km/s |
| 25 cm/h | 6.944444e-8 km/s |
| 50 cm/h | 1.388889e-7 km/s |
| 100 cm/h | 2.777778e-7 km/s |
Reverse conversion: Kilometer per Seconds to Centimeter per Hours
2.777778e-9 km/s × 360000000 = 1.00000008 cm/h
2.777778e-9 kilometer per seconds = 1.00000008 centimeter per hours.
centimeter per hours = kilometer per seconds × 360000000
For a page dedicated to this direction, see Kilometer per Seconds to Centimeter per Hours.
Understanding the Centimeter per Hours (cm/h)
Distance divided by time.
Understanding the Kilometer per Seconds (km/s)
Distance divided by time.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many kilometer per seconds are in 1 centimeter per hours?
1 centimeter per hours equals 2.777778e-9 kilometer per seconds, using the exact defined conversion factor rather than an estimate.
How do I convert centimeter per hours to kilometer per seconds?
Multiply the centimeter per hours value by 2.777778e-9. The converter above does this instantly to whatever precision you set.
How do I convert kilometer per seconds back to centimeter per hours?
Use the reverse factor: 1 kilometer per seconds equals 360,000,000 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 kilometer per seconds?
Kilometer per Seconds (km/s) is a unit of speed.
Is the centimeter per hours to kilometer per seconds conversion exact?
Yes. Both centimeter per hours and kilometer per seconds are defined by fixed standards rather than physical artifacts, so the factor of 2.777778e-9 used above is exact to as many digits as you choose to display.