Convert Square metres per second to Square millimetres per second

Convert Square metres per second (m²/s) to Square millimetres per second (mm²/s) instantly and accurately.

Square metres per second (m²/s)
Square millimetres per second (mm²/s)

Conversion Formula

mm²/s = m²/s × 1000000

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.

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

Square metres per second (m²/s)Square millimetres per second (mm²/s)
1 m²/s1000000 mm²/s
2 m²/s2000000 mm²/s
5 m²/s5000000 mm²/s
10 m²/s10000000 mm²/s
25 m²/s25000000 mm²/s
50 m²/s50000000 mm²/s
100 m²/s100000000 mm²/s

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