Convert Square feet per second to Square millimetres per second
Convert Square feet per second (ft²/s) to Square millimetres per second (mm²/s) instantly and accurately.
Conversion Formula
mm²/s = ft²/s × 92903.04
About Square feet per second
The square foot per second (ft²/s) equals 0.09290304 m²/s, the imperial base unit for thermal diffusivity analogous to m²/s. It is used in US aerospace engineering and combustion research for highly conductive materials and high-temperature plasmas. Diamond, the most thermally diffusive solid at ≈7 cm²/s, converts to ≈0.0075 ft²/s; silver to ≈0.00167 ft²/s. 1 ft²/s = 3600 ft²/h = 0.09290304 m²/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 feet per second (ft²/s) | Square millimetres per second (mm²/s) |
|---|---|
| 1 ft²/s | 92903 mm²/s |
| 2 ft²/s | 185806 mm²/s |
| 5 ft²/s | 464515 mm²/s |
| 10 ft²/s | 929030 mm²/s |
| 25 ft²/s | 2322580 mm²/s |
| 50 ft²/s | 4645150 mm²/s |
| 100 ft²/s | 9290300 mm²/s |