Enter a value and pick its unit (m²/s, mm²/s, cm²/s, stokes, centistokes, ft²/s), and the tool converts it to every other unit live.
Water at 20°C is about 1 centistokes (cSt) = 1 mm²/s = 1×10⁻⁶ m²/s.
1 stokes (St) = 100 centistokes (cSt) = 1×10⁻⁴ m²/s.
It is dynamic viscosity divided by density, describing how fast a fluid flows under gravity.