millimeter per hour
Speedexact by definition
The millimetre per hour is a speed, and it is how rainfall intensity is reported: a depth of water accumulating per unit time over a horizontal surface. Light rain is under 2.5 mm/h, heavy rain over 10, and the design storms that size a drainage system run to 50 or 100 mm/h for short durations.
Watch out: An intensity in mm/h is not a total. A 100 mm/h burst lasting six minutes delivers 10 mm of rain, and a storm reported at that intensity for the full hour would be an extreme event almost anywhere. Rational-method drainage design multiplies intensity by catchment area, so the duration used has to match the catchment's time of concentration.
| 1 | 2.7777778e-07 |
One millimeter per hour in every speed unit
| 8,766 | millimeter per year (mm/yr) | |
| 24 | millimeter per day (mm/day) | |
| 1 | millimeter per hour (mm/h)this unit | |
| 0.944882 | inch per day (in/day) | |
| 0.0787402 | foot per day (ft/d) | |
| 0.0393701 | inch per hour (in/h) | |
| 0.024 | meter per day (m/d) | |
| 0.0166667 | millimeter per minute (mm/min) | |
| 0.001 | meter per hour (m/h) | |
| 0.000656168 | inch per minute (in/min) | |
| 0.000277778 | millimeter per second (mm/s) | |
| 0.0000546807 | foot per minute (ft/min) | |
| 0.0000277778 | centimeter per second (cm/s) | |
| 0.0000166667 | meter per minute (m/min) | |
| 0.0000109361 | inch per second (in/s) | |
| 0.000001 | kilometer per hour (km/h) | |
| 9.11344e-07 | foot per second (ft/s) | |
| 6.21371e-07 | mile per hour (mph) | |
| 5.39957e-07 | knot (kn) | |
| 2.77778e-07 | meter per second (m/s) | |
| 8.16288e-10 | mach (sea level) (Ma) | |
| 2.77778e-10 | kilometer per second (km/s) | |
| 9.26567e-16 | speed of light (c) |
Solvers that use speed