💧 Kinematic Viscosity Converter
Convert kinematic viscosity units, square metre per second, square millimetre per second, stokes and centistokes. 1 cSt = 1 mm²/s; oil viscosity grades are given in centistokes.
1 m²/s = 1000000 mm²/s
1 square metres per second = 1000000 square millimetres per second
1 × 1000000 = 1000000
1 m²/s equals 1000000 mm²/s, so multiplying by 1000000 converts the value. The result describes the exact same quantity, only the measuring stick changes.
Popular kinematic viscosity conversions
All kinematic viscosity units
| Unit | Symbol | Definition |
|---|---|---|
| Square metre / second | m²/s | The SI unit of kinematic viscosity, dynamic viscosity divided by density. Most liquids are a tiny fraction of 1 m²/s (water is about 1×10⁻⁶ m²/s). |
| Square millimetre / second | mm²/s | One millionth of a m²/s (10⁻⁶ m²/s), numerically identical to the centistokes. The practical SI unit, water at 20 °C is about 1 mm²/s. |
| Stokes | St | The CGS unit of kinematic viscosity, one square centimetre per second, exactly 10⁻⁴ m²/s. Named after George Stokes. |
| Centistokes | cSt | One-hundredth of a stokes, equal to 1 mm²/s. The standard unit for lubricants, engine oils are typically rated by their centistokes at 40 °C and 100 °C. |
Frequently asked questions
How do I convert kinematic viscosity units?
Choose your two units in the converter above and type a value, the result updates instantly, entirely in your browser. All 4 kinematic viscosity units on this page are interchangeable, so you can convert in either direction.
Which kinematic viscosity units can I convert here?
This converter supports 4 kinematic viscosity units: Square metre / second (m²/s), Square millimetre / second (mm²/s), Stokes (St), Centistokes (cSt). Pick any two to convert between them.
What is the most common kinematic viscosity conversion?
One of the most-used kinematic viscosity conversions is Centistokes to Square metres per second (cSt → m²/s). Every kinematic viscosity pair we support is linked below, each with its own formula and table.
Is this Kinematic Viscosity Converter free and private?
Yes. It is free with no sign-up, uses the exact internationally defined conversion factors, and computes every result locally in your browser, nothing you type is uploaded, and the page keeps working offline.