Dynamic Viscosity Converter

Convert dynamic viscosity values among common SI, metric and customary units. Dynamic viscosity measures a fluid’s resistance to shear. One centipoise equals one millipascal second exactly.

ValueEnter zero or a positive value; scientific notation is accepted.Convert fromPascal second (Pa·s)Millipascal second (mPa·s)Centipoise (cP)Poise (P)Pound per foot-second (lb/(ft·s))Pound-force second per square foot (lbf·s/ft²)Convert toPascal second (Pa·s)Millipascal second (mPa·s)Centipoise (cP)Poise (P)Pound per foot-second (lb/(ft·s))Pound-force second per square foot (lbf·s/ft²)

Convert

Converted value0.1 Pa·s

SI-base value0.1 Pa·s

Multiply by0.001

The displayed results apply to the default example. Enable JavaScript to convert other values.

How to use this converter

1. Enter the dynamic viscosity value.
2. Select its current unit and the unit you want.
3. Select Convert. The page shows the converted value, the SI-base value and the direct multiplication factor.

Conversion formula

Converted value = entered value × source-to-SI factor ÷ target-to-SI factor.

Every option is represented by its factor to pascal second (Pa·s). This one-base method keeps reciprocal conversions consistent. Calculations run in your browser, and old results are hidden when an input changes or validation fails.

Worked example

Convert 100 cP to Pa·s. Multiply by 0.001; the result is 0.1 Pa·s. The same input equals 0.1 Pa·s in the SI-base unit.

Accuracy and limitations

Viscosity is highly temperature-dependent and can vary with shear rate for non-Newtonian fluids. Attach the converted value to its measurement conditions.

The calculator retains more digits internally than it displays. Round the final value to the precision supported by your measurement. Very large and very small answers may use scientific notation.

Frequently asked questions

Is centipoise the same as mPa·s?

Yes. One cP equals exactly one mPa·s.

Can I reverse the conversion?

Yes. Swap the From and To selections. Because both units use the same SI base, the reverse factor is the reciprocal of the forward factor.

Why was my entry rejected?

Use digits with an optional decimal point or scientific notation. Blank values, commas, fractions, words and non-finite entries are rejected. Negative values are rejected because this converter treats the quantity as a magnitude.

Review notes and sources

Reviewed October 4, 2026. The conversion factors, default example, zero or signed boundary behavior, invalid-input handling and recovery after an error were checked. Factors follow SI definitions and published conversion guidance from the NIST Guide to the SI and the BIPM SI Brochure. Explanations and examples are original.

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