Distance divided by time.
Millimeter per Hours to Millimeter per Seconds Converter — mm/h to mm/s
Convert Millimeter per Hours (mm/h) to Millimeter per Seconds (mm/s) using the exact conversion factor (1 millimeter per hours = 0.0002777778 millimeter per seconds). See the formula, worked examples, and conversion table.
Millimeter 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-7 / 0.001.
Speed uses meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Millimeter per Hours to Millimeter per Seconds
Millimeter 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 = millimeter per hours × 0.000277777777778
This factor comes from each unit's defined relationship to the category's base unit: 1 millimeter per hours equals 2.777778e-7 base units, and 1 millimeter per seconds equals 0.001 base units, so dividing one by the other gives the direct millimeter per hours-to-millimeter per seconds factor of 0.000277777777778.
Simple example
1 mm/h × 0.0002777777778 = 0.0002777778 mm/s
1 millimeter per hours = 0.0002777778 millimeter per seconds.
Real-world example
10 mm/h × 0.0002777777778 = 0.0027777778 mm/s
10 millimeter per hours = 0.0027777778 millimeter per seconds.
Conversion table
| Millimeter per Hours (mm/h) | Millimeter per Seconds (mm/s) |
|---|---|
| 1 mm/h | 0.0002777778 mm/s |
| 5 mm/h | 0.0013888889 mm/s |
| 10 mm/h | 0.0027777778 mm/s |
| 25 mm/h | 0.0069444444 mm/s |
| 50 mm/h | 0.0138888889 mm/s |
| 100 mm/h | 0.0277777778 mm/s |
Reverse conversion: Millimeter per Seconds to Millimeter per Hours
0.0002777778 mm/s × 3600 = 1.00000008 mm/h
0.0002777778 millimeter per seconds = 1.00000008 millimeter per hours.
millimeter per hours = millimeter per seconds × 3600
For a page dedicated to this direction, see Millimeter per Seconds to Millimeter per Hours.
Understanding the Millimeter per Hours (mm/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 millimeter per hours?
1 millimeter per hours equals 0.0002777778 millimeter per seconds, using the exact defined conversion factor rather than an estimate.
How do I convert millimeter per hours to millimeter per seconds?
Multiply the millimeter per hours value by 0.0002777777778. The converter above does this instantly to whatever precision you set.
How do I convert millimeter per seconds back to millimeter per hours?
Use the reverse factor: 1 millimeter per seconds equals 3,600 millimeter per hours. You can also use the swap control in the converter above to flip the direction instantly.
What is a millimeter per hours?
Millimeter per Hours (mm/h) is a unit of speed.
What is a millimeter per seconds?
Millimeter per Seconds (mm/s) is a unit of speed.
Is the millimeter per hours to millimeter per seconds conversion exact?
Yes. Both millimeter per hours and millimeter per seconds are defined by fixed standards rather than physical artifacts, so the factor of 0.0002777777778 used above is exact to as many digits as you choose to display.