Convert Square millimetres per second to Square centimetres per hour
Convert Square millimetres per second (mm²/s) to Square centimetres per hour (cm²/h) instantly and accurately.
Conversion Formula
cm²/h = mm²/s × 36
About Square millimetres per second
The square millimetre per second (mm²/s) equals 1 × 10⁻⁶ m²/s and is the standard unit in materials engineering and the laser-flash diffusivity method (ASTM E1461, ISO 22007-4). Metals span roughly 2-180 mm²/s; polymers 0.07-0.2 mm²/s; ceramics 0.3-10 mm²/s. Numerically identical to the kinematic viscosity unit (cSt) in SI context. 1 mm²/s = 1 × 10⁻⁶ m²/s.
About Square centimetres per hour
The square centimetre per hour (cm²/h) equals 1/36 000 000 m²/s. Environmental geophysicists use cm²/h when measuring heat flow in sedimentary rock columns or permafrost layers. Granite has a diffusivity of ≈36 cm²/h; dry sand ≈9 cm²/h. 1 cm²/h = 1e-4/3600 m²/s ≈ 2.778 × 10⁻⁸ m²/s.
Quick Reference Table
| Square millimetres per second (mm²/s) | Square centimetres per hour (cm²/h) |
|---|---|
| 1 mm²/s | 36 cm²/h |
| 2 mm²/s | 72 cm²/h |
| 5 mm²/s | 180 cm²/h |
| 10 mm²/s | 360 cm²/h |
| 25 mm²/s | 900 cm²/h |
| 50 mm²/s | 1800 cm²/h |
| 100 mm²/s | 3600 cm²/h |