Convert Square feet per minute to Square millimetres per second
Convert Square feet per minute (ft²/min) to Square millimetres per second (mm²/s) instantly and accurately.
Conversion Formula
mm²/s = ft²/min × 1548.384
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.
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 feet per minute (ft²/min) | Square millimetres per second (mm²/s) |
|---|---|
| 1 ft²/min | 1548.38 mm²/s |
| 2 ft²/min | 3096.77 mm²/s |
| 5 ft²/min | 7741.92 mm²/s |
| 10 ft²/min | 15483.8 mm²/s |
| 25 ft²/min | 38709.6 mm²/s |
| 50 ft²/min | 77419.2 mm²/s |
| 100 ft²/min | 154838 mm²/s |