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Viscosity Converter
Convert dynamic viscosity between Pa·s, cP, poise, and pound-force-second units instantly. Runs entirely in your browser.
🔒 This tool runs entirely in your browser. Your files are never uploaded to a server.
This converts dynamic (absolute) viscosity. Kinematic viscosity (cSt, m²/s) is a different quantity requiring fluid density to convert - not included here.
Pa·s
cP
Poise
lbf·s/ft²
reyn (lbf·s/in²)
How the viscosity converter works
- Enter a viscosity value and choose its starting unit.
- See the equivalent value across all supported dynamic viscosity units instantly.
- Remember: this covers dynamic viscosity only, not kinematic viscosity.
FAQ
What units does this convert between?
Pascal-second, millipascal-second, centipoise, poise, pound-force-second per square foot, and reyn (pound-force-second per square inch) - all units of dynamic (absolute) viscosity.
What is the difference between dynamic and kinematic viscosity?
Dynamic viscosity measures a fluid's resistance to shear (units like Pa·s or cP). Kinematic viscosity (units like cSt or m²/s) is dynamic viscosity divided by density - converting between them requires knowing the fluid's density, so it isn't included in this tool.
What is centipoise commonly used for?
It's a widely used unit in industry - for reference, water at room temperature is about 1 cP, while honey is roughly 2,000-10,000 cP.
What is a reyn?
A unit of dynamic viscosity in the US customary system (pound-force-second per square inch), commonly used in lubrication engineering.
How we compare
| Feature | Online Tool Store | Manual conversion table | Engineering handbook lookup |
|---|---|---|---|
| Instant, all units at once | ✓ | ✗ | ✗ |
| No install required | ✓ | ✓ | ✓ |
| Handles US customary units | ✓ | ✗ | ✓ |
Handy for engineers and chemists converting between metric and imperial viscosity units on the fly.