MOMENTUM DIFFUSIVITY WORKSPACE

Kinematic Viscosity Converter

Convert kinematic viscosity among square metres, square millimetres, stokes, centistokes, and square feet per stated time.

Reviewed reference factorsValues stay in this browser tabKinematic viscosity only; dynamic viscosity, density, temperature correction, rheology, and flow regime are not calculated.

Conversion input

Convert a known kinematic viscosity

Enter the property value reported for a fluid at stated conditions. Keep stokes and centistokes separate from poise and centipoise.

Find a unit6 / 6

Filter by unit name, symbol, or code. Your current selections remain available.

Known value0 / 80

Enter a non-negative kinematic viscosity and retain the measurement temperature, pressure, and composition.

Convert from

Choose the unit attached to the value you entered.

Convert to

Choose the unit required for your report, estimate, or comparison.

Displayed precision

Choose the maximum decimal places shown. This does not increase source accuracy.

Conversion runs locally after the active reference catalogue loads.

Conversion result

Your checked conversion appears here

Load the reviewed example or enter a value to compare every available kinematic viscosity unit.

What this tool delivers

Kinematic Viscosity conversion contract

This route converts momentum diffusivity units and deliberately excludes dynamic-viscosity units that require density to relate.

What it converts

Converts six kinematic-viscosity conventions through square metres per second.

What you provide

A measured or specified value, exact source unit, destination unit, material conditions, and useful precision.

What you receive

A selected equivalent, SI factor path, full property table, and CSV export.

Calculation method

Why centistokes map to square millimetres per second

Each unit is expressed in square metres per second before destination conversion. One stokes is 10^-4 m2/s and one centistokes is 10^-6 m2/s, numerically equal to one square millimetre per second under the unit definitions.

Review the NIST kinematic-viscosity conversion factors

Quick answers

Kinematic Viscosity Converter questions

Are centistokes and centipoise interchangeable?

No. Centistokes measure kinematic viscosity, while centipoise measure dynamic viscosity. Their numerical relationship depends on fluid density using consistent units and conditions. This converter accepts centistokes but deliberately excludes centipoise so a label-only conversion cannot silently assume density or mix two fundamentally different physical properties.

Why does one centistokes equal one square millimetre per second?

The equality follows exactly from the unit definitions: one stokes is one square centimetre per second, and one centistokes is one hundredth of that. Converting the area prefix gives 10^-6 square metres per second, which is also one square millimetre per second. No fluid property assumption is involved.

Can I compare viscosity values measured at different temperatures?

Only with care. Kinematic viscosity can change strongly with temperature, and the relationship depends on the fluid. This page changes units but does not normalize conditions. Retain the reported temperature, pressure, composition, test method, and uncertainty, and use a validated material model if values must be adjusted between states.