Convert Microstokes to Square millimetres per second
Convert Microstokes (µSt) to Square millimetres per second (mm²/s) instantly and accurately.
Conversion Formula
mm²/s = µSt × 0.0001
About Microstokes
The microstoke (µSt) equals 10⁻¹⁰ m²/s, the smallest CGS subdivision of practical interest for kinematic viscosity. It covers extremely rarified or high-temperature gas viscosity and is rarely encountered outside theoretical research. The centistoke is the practical lower bound in most engineering work. 1 µSt = 10⁻⁶ St = 10⁻¹⁰ m²/s.
About Square millimetres per second
The square millimetre per second (mm²/s) equals 10⁻⁶ m²/s, numerically identical to 1 centistoke (cSt). It is the preferred SI-consistent expression: ISO 3104, DIN 51562, and ASTM viscosity standards all use mm²/s interchangeably with cSt. Water at 20 °C ≈ 1.004 mm²/s; SAE 10W-30 at 100 °C: 9.3-12.5 mm²/s. 1 mm²/s = 1 cSt.
Quick Reference Table
| Microstokes (µSt) | Square millimetres per second (mm²/s) |
|---|---|
| 1 µSt | 0.0001 mm²/s |
| 2 µSt | 0.0002 mm²/s |
| 5 µSt | 0.0005 mm²/s |
| 10 µSt | 0.001 mm²/s |
| 25 µSt | 0.0025 mm²/s |
| 50 µSt | 0.005 mm²/s |
| 100 µSt | 0.01 mm²/s |