Convert Square millimetres per second to Square metres per second
Convert Square millimetres per second (mm²/s) to Square metres per second (m²/s) instantly and accurately.
Conversion Formula
m²/s = mm²/s × 1.000000000e-6
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.
About Square metres per second
The square metre per second (m²/s) is the SI coherent unit of kinematic viscosity (ν = μ/ρ). Air at 20 °C ≈ 1.516 × 10⁻⁵ m²/s; water at 20 °C ≈ 1.004 × 10⁻⁶ m²/s; glycerol ≈ 1.19 × 10⁻³ m²/s. It is the standard in CFD codes and SI research literature. 1 m²/s = 10⁴ St = 10⁶ cSt.
Quick Reference Table
| Square millimetres per second (mm²/s) | Square metres per second (m²/s) |
|---|---|
| 1 mm²/s | 1 × 10-6 m²/s |
| 2 mm²/s | 2 × 10-6 m²/s |
| 5 mm²/s | 5 × 10-6 m²/s |
| 10 mm²/s | 1 × 10-5 m²/s |
| 25 mm²/s | 2.5 × 10-5 m²/s |
| 50 mm²/s | 5 × 10-5 m²/s |
| 100 mm²/s | 1 × 10-4 m²/s |