Convert Square millimetres per hour to Square decimetres per second
Convert Square millimetres per hour (mm²/h) to Square decimetres per second (dm²/s) instantly and accurately.
Conversion Formula
dm²/s = mm²/h × 2.777777778e-8
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.
About Square decimetres per second
The square decimetre per second (dm²/s) equals exactly 0.01 m²/s, a rarely used but exact-ratio metric unit. It is occasionally encountered in European academic papers on molten metals and liquid semiconductors, where diffusivity values in m²/s are small fractions and dm²/s gives more convenient numeric magnitudes. 1 dm²/s = 1e-2 m²/s = 100 cm²/s.
Quick Reference Table
| Square millimetres per hour (mm²/h) | Square decimetres per second (dm²/s) |
|---|---|
| 1 mm²/h | 2.778 × 10-8 dm²/s |
| 2 mm²/h | 5.556 × 10-8 dm²/s |
| 5 mm²/h | 1.389 × 10-7 dm²/s |
| 10 mm²/h | 2.778 × 10-7 dm²/s |
| 25 mm²/h | 6.944 × 10-7 dm²/s |
| 50 mm²/h | 1.389 × 10-6 dm²/s |
| 100 mm²/h | 2.778 × 10-6 dm²/s |