Viscosity converter
Dynamic viscosity (Pa·s, cP, poise) and kinematic viscosity (m²/s, cSt, stokes), two distinct quantities.
Result
Converted value
1 mPa·s
- Formula
- 1 cP = 1 mPa·s
Calculation, assumptions and sources
OverviewConversion of a dynamic viscosity (Pa·s, mPa·s, µPa·s, cP, poise) or a kinematic viscosity (m²/s, cm²/s, mm²/s, cSt, stokes) between its units.
Conversion of a dynamic viscosity (Pa·s, mPa·s, µPa·s, cP, poise) or a kinematic viscosity (m²/s, cm²/s, mm²/s, cSt, stokes) between its units. Going from one to the other requires the fluid density.
Method & formulasν = η / ρ
ν = η / ρ1 cP = 1 mPa·s (exactly)1 cSt = 1 mm²/s (exactly)
Kinematic viscosity ν is the ratio of dynamic viscosity η to density ρ. At room temperature water is 1 cP and about 1 cSt, hence the lasting use of these two units.
- µPa·s
- Micropascal-second (µPa·s)
- mPa·s
- Millipascal-second (mPa·s)
- Pa·s
- Pascal-second (Pa·s)
- cP
- Centipoise (cP)
- P
- Poise (P)
- mm²/s
- Square millimeter per second (mm²/s)
- cm²/s
- Square centimeter per second (cm²/s)
- m²/s
- Square meter per second (m²/s)
- cSt
- Centistokes (cSt)
- St
- Stokes (St)
Validity domainWithout ρ, going from cP to cSt amounts to assuming the density of water, and the result is wrong for any other fluid.
Without ρ, going from cP to cSt amounts to assuming the density of water, and the result is wrong for any other fluid. SU-8 2025, for instance, is given as 4500 cSt at a density of 1.219 g/mL.