Convert Square millimetres per second to Square feet per minute
Convert Square millimetres per second (mm²/s) to Square feet per minute (ft²/min) instantly and accurately.
Conversion Formula
ft²/min = mm²/s × 0.000645834625
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 feet per minute
The square foot per minute (ft²/min) equals 0.3048²/60 ≈ 1.548 × 10⁻³ m²/s. It appears in US HVAC, ventilation, and turbine-cooling design where velocities are quoted in ft/min. 1 ft²/min ≈ 1548 cSt.
Quick Reference Table
| Square millimetres per second (mm²/s) | Square feet per minute (ft²/min) |
|---|---|
| 1 mm²/s | 0.000645835 ft²/min |
| 2 mm²/s | 0.00129167 ft²/min |
| 5 mm²/s | 0.00322917 ft²/min |
| 10 mm²/s | 0.00645835 ft²/min |
| 25 mm²/s | 0.0161459 ft²/min |
| 50 mm²/s | 0.0322917 ft²/min |
| 100 mm²/s | 0.0645835 ft²/min |