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.
Conversion Formula
mm²/s = m²/s × 1000000
About Square metres per second
The square metre per second (m²/s) is the SI unit for thermal diffusivity (α = k / ρc_p). It defines how fast a temperature disturbance propagates through a material. Diamond: ≈5 × 10⁻⁴ m²/s; silver: ≈1.65 × 10⁻⁴ m²/s; aluminium: ≈8.4 × 10⁻⁵ m²/s; iron: ≈1.8 × 10⁻⁵ m²/s; concrete: ≈6 × 10⁻⁷ m²/s; water: ≈1.4 × 10⁻⁷ m²/s. 1 m²/s = 10⁶ mm²/s = 10⁴ cm²/s.
About Square millimetres per second
The square millimetre per second (mm²/s) equals 1 × 10⁻⁶ m²/s and is the standard unit in materials engineering and the laser-flash diffusivity method (ASTM E1461, ISO 22007-4). Metals span roughly 2-180 mm²/s; polymers 0.07-0.2 mm²/s; ceramics 0.3-10 mm²/s. Numerically identical to the kinematic viscosity unit (cSt) in SI context. 1 mm²/s = 1 × 10⁻⁶ m²/s.
Quick Reference Table
| Square metres per second (m²/s) | Square millimetres per second (mm²/s) |
|---|---|
| 1 m²/s | 1000000 mm²/s |
| 2 m²/s | 2000000 mm²/s |
| 5 m²/s | 5000000 mm²/s |
| 10 m²/s | 10000000 mm²/s |
| 25 m²/s | 25000000 mm²/s |
| 50 m²/s | 50000000 mm²/s |
| 100 m²/s | 100000000 mm²/s |