Convert Square centimetres per hour to Square millimetres per hour
Convert Square centimetres per hour (cm²/h) to Square millimetres per hour (mm²/h) instantly and accurately.
Conversion Formula
mm²/h = cm²/h × 100
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.
About Square millimetres per hour
The square millimetre per hour (mm²/h) equals 1/3 600 000 000 m²/s, the smallest practical thermal diffusivity unit. It is used in very slow heat-transfer processes such as diffusion through frozen soils or phase-change materials studied over many hours. Heavy clay soils can show diffusivity values of 1-2 mm²/h. 1 mm²/h = 1e-6/3600 m²/s.
Quick Reference Table
| Square centimetres per hour (cm²/h) | Square millimetres per hour (mm²/h) |
|---|---|
| 1 cm²/h | 100 mm²/h |
| 2 cm²/h | 200 mm²/h |
| 5 cm²/h | 500 mm²/h |
| 10 cm²/h | 1000 mm²/h |
| 25 cm²/h | 2500 mm²/h |
| 50 cm²/h | 5000 mm²/h |
| 100 cm²/h | 10000 mm²/h |