Convert Stokes to Square millimetres per hour
Convert Stokes (St) to Square millimetres per hour (mm²/h) instantly and accurately.
Conversion Formula
mm²/h = St × 360000
About Stokes
The stoke (St) equals 1 cm²/s = 10⁻⁴ m²/s, the CGS unit of kinematic viscosity named after Sir George Gabriel Stokes. Its hundredth part, the centistoke, is now dominant, but the stoke still appears in older fluid-mechanics texts and archival API and ASTM data. Water at 20 °C ≈ 0.01004 St; air at 20 °C ≈ 0.1516 St. 1 St = 100 cSt = 10⁻⁴ m²/s.
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.
Quick Reference Table
| Stokes (St) | Square millimetres per hour (mm²/h) |
|---|---|
| 1 St | 360000 mm²/h |
| 2 St | 720000 mm²/h |
| 5 St | 1800000 mm²/h |
| 10 St | 3600000 mm²/h |
| 25 St | 9000000 mm²/h |
| 50 St | 18000000 mm²/h |
| 100 St | 36000000 mm²/h |