Conversion method
Kinematic viscosity is dynamic viscosity divided by density. A centistokes is exactly one square millimeter per second.
cSt = x × 1000000
10 m²/s = 10000000 cSt.
| m²/s | cSt |
|---|---|
| 1 | 1000000 |
| 5 | 5000000 |
| 10 | 10000000 |
| 25 | 25000000 |
| 50 | 50000000 |
| 100 | 100000000 |
Unit definitions and sources
Kinematic viscosity is dynamic viscosity divided by density. A centistokes is exactly one square millimeter per second.
| Unit and system | Use | Definition | Relationship |
|---|---|---|---|
| Square meter per second (m²/s); si | Common units | Square meter per second: base (m2-s) = value × 1. Common use: Kinematic Viscosity. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Centistokes (cSt); si | Common units | Centistokes: base (m2-s) = value × 1e-06. Common use: Kinematic Viscosity. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Stokes (St); si | Specialist units | Stokes: base (m2-s) = value × 0.0001. Common use: Kinematic Viscosity. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Square millimeter per second (mm²/s); si | Specialist units | Square millimeter per second: base (m2-s) = value × 1e-06. Common use: Kinematic Viscosity. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Square foot per second (ft²/s); si | Specialist units | Square foot per second: base (m2-s) = value × 0.09290304. Common use: Kinematic Viscosity. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Square meter/hour (m²/(h)); other | Specialist units | square meter/hour = 0.0002777777777777778 m2-s, derived from the component SI/customary definitions. Common use: Kinematic Viscosity. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Square centimeter/second (cm²/(s)); other | Specialist units | square centimeter/second = 0.0001 m2-s, derived from the component SI/customary definitions. Common use: Kinematic Viscosity. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Square foot/hour (ft²/(h)); other | Specialist units | square foot/hour = 2.58064e-05 m2-s, derived from the component SI/customary definitions. Common use: Kinematic Viscosity. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
| Square inch/second (in²/(s)); other | Specialist units | square inch/second = 0.00064516 m2-s, derived from the component SI/customary definitions. Common use: Kinematic Viscosity. Source checked 2026-09-20 (implementation review). | Exact definition; numerical display may be rounded |
Sources: NIST: SP 811 Appendix B.8: conversion factors; BIPM: SI prefixes
Precision of kinematic viscosity conversions
All 9 kinematic viscosity units convert through Square meter per second (m²/s). 9 have an exact defined relationship to the base unit and 0 are conventional or measured values. Results and the tables on this page come from the same engine, so a table value can be checked against the converter directly.
Standard display shows up to six decimal places, switching to scientific notation for very large or small values. Calculation uses JavaScript binary floating point independently of display rounding, so extra digits are not a claim about measurement accuracy. Each unit lists its own source; a citation records where the definition comes from, not an independent review. See Conversion methodology for the review and correction process.