Poise–Stokes Converter
Compute ν in cSt and m²/s from μ in cP and density in g/cm³.
How to Use This Converter
1
Enter μ in cP
For water at 20°C, μ ≈ 1 cP.
2
Enter ρ in g/cm³
For water at 20°C, ρ ≈ 0.998 g/cm³.
3
Convert
The tool outputs ν in cSt and m²/s and μ in Pa·s.
Formula
ν(cSt) = μ(cP) / ρ(g/cm³)
Also, μ(Pa·s) = μ(cP) × 0.001; ν(m²/s) = ν(cSt) × 1e−6.
Example: μ=1.0 cP, ρ=1.0 g/cm³ ⇒ ν = 1.0 cSt = 1e−6 m²/s; μ = 0.001 Pa·s.
Frequently Asked Questions
When to use cP vs cSt?
cP is dynamic viscosity; cSt is kinematic viscosity. Kinematic includes density effects.
Temperature effects?
Viscosity and density vary with temperature; use values at the operating condition.