Convert Square millimetres per second to Square metres per hour
Convert Square millimetres per second (mm²/s) to Square metres per hour (m²/h) instantly and accurately.
Conversion Formula
m²/h = mm²/s × 0.0036
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 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 second (mm²/s) | Square metres per hour (m²/h) |
|---|---|
| 1 mm²/s | 0.0036 m²/h |
| 2 mm²/s | 0.0072 m²/h |
| 5 mm²/s | 0.018 m²/h |
| 10 mm²/s | 0.036 m²/h |
| 25 mm²/s | 0.09 m²/h |
| 50 mm²/s | 0.18 m²/h |
| 100 mm²/s | 0.36 m²/h |