Viscosity ConverterConvert between pascal-seconds, centipoise, poise, stokes, and ft²/s viscosity units.
Viscosity Converter
Convert between pascal-seconds, centipoise, poise, stokes, and ft²/s viscosity units.
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Type the viscosity value to convert.
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Choose source and target viscosity units.
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Converted viscosity appears instantly.
What Is Viscosity Converter?
A viscosity converter translates between units measuring a fluid's resistance to flow. Dynamic viscosity (Pa·s, cP, P) describes the internal friction of a flowing fluid. The pascal-second (Pa·s) is the SI unit; the centipoise (cP) is the most commonly used unit in practice because water has a viscosity of approximately 1 cP at 20°C. The poise (P) is the CGS unit. Stokes (St) and ft²/s measure kinematic viscosity (dynamic viscosity divided by density). Viscosity is critical in fluid mechanics, lubrication engineering, food science, paint formulation, and pharmaceutical manufacturing.
Why Use Our Viscosity Converter?
- Covers both SI (Pa·s) and CGS (cP, P) dynamic viscosity units.
- Includes kinematic viscosity units (stokes, ft²/s).
- Essential for fluid mechanics and materials engineering.
- Real-time conversion.
Common Use Cases
Fluid Mechanics
Convert viscosity values between SI and CGS systems for calculations.
Lubrication
Compare oil viscosity specifications across different standards.
Food Science
Specify and compare the viscosity of sauces, creams, and other products.
Paint & Coatings
Convert viscosity measurements for quality control across international standards.
Technical Guide
Viscosity measures a fluid's resistance to shear or flow. Dynamic viscosity (force per area per velocity gradient): • 1 Pa·s = 1 kg/(m·s) • 1 poise (P) = 0.1 Pa·s • 1 centipoise (cP) = 0.001 Pa·s = 1 mPa·s Kinematic viscosity (dynamic viscosity / density): • 1 stokes (St) = 1 cm²/s = 10⁻⁴ m²/s • 1 ft²/s = 0.0929 m²/s Common viscosities at 20°C: • Water: ~1 cP (1 mPa·s) • Blood: ~3-4 cP • Olive oil: ~80 cP • Honey: ~2,000-10,000 cP • Peanut butter: ~250,000 cP Note: Stokes and Pa·s measure different quantities (kinematic vs dynamic) and cannot be directly converted without knowing the fluid density. This converter provides factor-based conversion for convenience.
Tips & Best Practices
- 1Water at 20°C has a viscosity of about 1 cP (centipoise) — a convenient reference.
- 21 Pa·s = 1,000 cP = 10 poise.
- 3Motor oil viscosity: SAE 10W-30 is about 10-100 cP depending on temperature.
- 4Kinematic viscosity (stokes) = dynamic viscosity (poise) / density (g/cm³).
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Unit ConvertersFrequently Asked Questions
QHow do I convert centipoise to pascal-seconds?
QWhat is the viscosity of water?
QWhat is the difference between dynamic and kinematic viscosity?
QWhat are stokes?
About Viscosity Converter
Viscosity Converter is a free online tool from FreeToolkit.ai. All processing happens directly in your browser — your data never leaves your device. No registration required. No ads. Just fast, reliable tools.