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Convert Millimeter/Hour (mm/h) to Kilometer/Second (km/s) instantly.

About these units

Millimeter/Hour (mm/h)

A millimeter per hour is extraordinarily slow, used in geology, meteorology, and materials science to measure phenomena like soil creep, tectonic plate micro-motion, or extremely light precipitation (drizzle). In manufacturing, mm/h may describe slow deposition rates in thin-film fabrication or high-precision milling processes. Despite seeming negligible, speeds measured in mm/h can accumulate into significant changes over weeks, months, or years—making them essential for long-term studies.

Kilometer/Second (km/s)

A kilometer per second represents a very high speed—1,000 meters every second—and is particularly important in astronomy, planetary science, and astrophysics. Orbital velocities around planets, escape velocities, solar winds, and the motion of stars relative to each other are commonly measured in km/s. This scale captures speeds far beyond terrestrial transportation. For example, Earth orbits the Sun at roughly 30 km/s, and meteoroids entering Earth's atmosphere may arrive at speeds between 11 and 72 km/s. km/s is a natural step up from m/s when describing the motion of celestial bodies.

More Millimeter/Hour converters

Millimeter/Hour [mm/h] ↔ Meter/Second [m/s]
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Millimeter/Hour [mm/h] ↔ Kilometer/Hour [km/h]
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Millimeter/Hour [mm/h] ↔ Mile/Hour [mi/h]
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Millimeter/Hour [mm/h] ↔ Foot/Second [ft/s]
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Millimeter/Hour [mm/h] ↔ Kilometer/Second [km/s]
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Millimeter/Hour [mm/h] ↔ Knot [kt]
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Millimeter/Hour [mm/h] ↔ Mach (SI Standard) [Ma]
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Millimeter/Hour [mm/h] ↔ Speed of Light [c]
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Millimeter/Hour [mm/h] ↔ Kilometer/Minute [km/min]
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Millimeter/Hour [mm/h] ↔ Mile/Second [mi/s]
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Millimeter/Hour [mm/h] ↔ Meter/Hour [m/h]
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Millimeter/Hour [mm/h] ↔ Meter/Minute [m/min]
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Millimeter/Hour [mm/h] ↔ Centimeter/Hour [cm/h]
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Millimeter/Hour [mm/h] ↔ Centimeter/Minute [cm/min]
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Millimeter/Hour [mm/h] ↔ Centimeter/Second [cm/s]
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Millimeter/Hour [mm/h] ↔ Millimeter/Minute [mm/min]
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Millimeter/Hour [mm/h] ↔ Millimeter/Second [mm/s]
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Millimeter/Hour [mm/h] ↔ Foot/Hour [ft/h]
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Millimeter/Hour [mm/h] ↔ Foot/Minute [ft/min]
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Millimeter/Hour [mm/h] ↔ Yard/Hour [yd/h]
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Millimeter/Hour [mm/h] ↔ Yard/Minute [yd/min]
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Millimeter/Hour [mm/h] ↔ Yard/Second [yd/s]
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Millimeter/Hour [mm/h] ↔ Mile/Minute [mi/min]
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Millimeter/Hour [mm/h] ↔ Knot (UK) [kt (UK)]
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Millimeter/Hour [mm/h] ↔ Cosmic Velocity - First [v₁]
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Millimeter/Hour [mm/h] ↔ Cosmic Velocity - Second [v₂]
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Millimeter/Hour [mm/h] ↔ Cosmic Velocity - Third [v₃]
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Millimeter/Hour [mm/h] ↔ Earth's Velocity [v⊕]
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Millimeter/Hour [mm/h] ↔ Speed of Sound in Pure Water [vₕ₂ₒ]
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Millimeter/Hour [mm/h] ↔ Speed of Sound in Sea Water [vₛₑₐ]
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Millimeter/Hour [mm/h] ↔ Mach (20°C, 1 atm) [Ma (20°C)]
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Millimeter/Hour [mm/h] ↔ Walking Speed [walk]
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Millimeter/Hour [mm/h] ↔ Running Speed [run]
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Millimeter/Hour [mm/h] ↔ Cycling Speed [cycle]
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Convert Millimeter/Hour to Kilometer/Second