Convert kilometer/hour to millimeter/hour
Please provide values below to convert kilometer/hour [km/h] to millimeter/hour [mm/h], or Convert millimeter/hour to kilometer/hour.
How to Convert Kilometer/hour to Millimeter/hour
1 km/h = 999999.99928 mm/h
Example: convert 15 km/h to mm/h:
15 km/h = 15 × 999999.99928 mm/h = 14999999.9892 mm/h
Kilometer/hour to Millimeter/hour Conversion Table
| kilometer/hour | millimeter/hour |
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Kilometer/hour
Kilometer per hour (km/h) is a unit of speed expressing the number of kilometers traveled in one hour.
History/Origin
The km/h unit originated from the metric system, developed in France during the late 18th century, and became widely adopted for measuring speed in transportation and scientific contexts.
Current Use
Km/h is commonly used worldwide to specify vehicle speeds, speed limits, and other applications involving the measurement of speed in everyday life and transportation systems.
Millimeter/hour
Millimeter per hour (mm/h) is a unit of measurement that indicates the rate of rainfall or precipitation, representing how many millimeters of water fall in one hour.
History/Origin
The millimeter per hour has been used in meteorology and hydrology to quantify rainfall intensity, especially with the advent of precise rain gauges and weather measurement tools in the 20th century.
Current Use
Today, mm/h is commonly used in weather forecasting, climate studies, and hydrological assessments to measure and communicate the intensity of rainfall events.