Convert Square millimetres per hour to Square metres per second
Convert Square millimetres per hour (mm²/h) to Square metres per second (m²/s) instantly and accurately.
Conversion Formula
m²/s = mm²/h × 2.777777778e-10
About Square millimetres per hour
The square millimetre per hour (mm²/h) equals 1/(3.6 × 10⁹) m²/s ≈ 2.78 × 10⁻¹⁰ m²/s. It appears in materials science for solid-state diffusion and thin-film growth studies where hourly timescales are more natural than seconds. 1 mm²/h = 1/3600 mm²/s = 1/3600 cSt.
About Square metres per second
The square metre per second (m²/s) is the SI coherent unit of kinematic viscosity (ν = μ/ρ). Air at 20 °C ≈ 1.516 × 10⁻⁵ m²/s; water at 20 °C ≈ 1.004 × 10⁻⁶ m²/s; glycerol ≈ 1.19 × 10⁻³ m²/s. It is the standard in CFD codes and SI research literature. 1 m²/s = 10⁴ St = 10⁶ cSt.
Quick Reference Table
| Square millimetres per hour (mm²/h) | Square metres per second (m²/s) |
|---|---|
| 1 mm²/h | 2.778 × 10-10 m²/s |
| 2 mm²/h | 5.556 × 10-10 m²/s |
| 5 mm²/h | 1.389 × 10-9 m²/s |
| 10 mm²/h | 2.778 × 10-9 m²/s |
| 25 mm²/h | 6.944 × 10-9 m²/s |
| 50 mm²/h | 1.389 × 10-8 m²/s |
| 100 mm²/h | 2.778 × 10-8 m²/s |