Convert Square millimetres per hour to Square metres per hour
Convert Square millimetres per hour (mm²/h) to Square metres per hour (m²/h) instantly and accurately.
Conversion Formula
m²/h = mm²/h × 1.000000000e-6
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 metres per hour
The square metre per hour (m²/h) equals 1/3600 m²/s ≈2.778 × 10⁻⁴ m²/s, used in large-scale geotechnical and civil engineering analyses. Soil consolidation models and groundwater thermal plume simulations often use m²/h because the full diffusion process unfolds over hours to days. 1 m²/h = 10 000 cm²/h ≈ 2.778 × 10⁻⁴ m²/s.
Quick Reference Table
| Square millimetres per hour (mm²/h) | Square metres per hour (m²/h) |
|---|---|
| 1 mm²/h | 1 × 10-6 m²/h |
| 2 mm²/h | 2 × 10-6 m²/h |
| 5 mm²/h | 5 × 10-6 m²/h |
| 10 mm²/h | 1 × 10-5 m²/h |
| 25 mm²/h | 2.5 × 10-5 m²/h |
| 50 mm²/h | 5 × 10-5 m²/h |
| 100 mm²/h | 1 × 10-4 m²/h |