Convert Square millimetres per hour to Centistokes
Convert Square millimetres per hour (mm²/h) to Centistokes (cSt) instantly and accurately.
Conversion Formula
cSt = mm²/h × 0.0002777777778
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 Centistokes
The centistoke (cSt) equals 10⁻⁶ m²/s = 1 mm²/s. It is the dominant unit for kinematic viscosity in industry worldwide. ASTM D445, ISO 3104, and ACEA lubricant specifications all use cSt. Water at 20 °C ≈ 1.004 cSt; diesel at 40 °C: 2.0-4.5 cSt; SAE 40 oil at 100 °C: 12.5-16.3 cSt. 1 cSt = 10⁻² St.
Quick Reference Table
| Square millimetres per hour (mm²/h) | Centistokes (cSt) |
|---|---|
| 1 mm²/h | 0.000277778 cSt |
| 2 mm²/h | 0.000555556 cSt |
| 5 mm²/h | 0.00138889 cSt |
| 10 mm²/h | 0.00277778 cSt |
| 25 mm²/h | 0.00694444 cSt |
| 50 mm²/h | 0.0138889 cSt |
| 100 mm²/h | 0.0277778 cSt |