Convert Square millimetres per minute to Square feet per hour
Convert Square millimetres per minute (mm²/min) to Square feet per hour (ft²/h) instantly and accurately.
Conversion Formula
ft²/h = mm²/min × 0.000645834625
About Square millimetres per minute
The square millimetre per minute (mm²/min) equals 1/(6 × 10⁷) m²/s ≈ 1.667 × 10⁻⁸ m²/s. It is used in polymer-film formation and printing-ink diffusion studies where minute-scale time resolution is more convenient. 1 mm²/min = 1/60 cSt.
About Square feet per hour
The square foot per hour (ft²/h) equals 0.3048²/3600 ≈ 2.581 × 10⁻⁵ m²/s. It is the standard US unit for thermal diffusivity in the BTU-ft-h system, used alongside heat-transfer and mass-transfer calculations. Air at 20 °C ≈ 0.573 ft²/h; water at 20 °C ≈ 0.0096 ft²/h. 1 ft²/h ≈ 25.81 cSt.
Quick Reference Table
| Square millimetres per minute (mm²/min) | Square feet per hour (ft²/h) |
|---|---|
| 1 mm²/min | 0.000645835 ft²/h |
| 2 mm²/min | 0.00129167 ft²/h |
| 5 mm²/min | 0.00322917 ft²/h |
| 10 mm²/min | 0.00645835 ft²/h |
| 25 mm²/min | 0.0161459 ft²/h |
| 50 mm²/min | 0.0322917 ft²/h |
| 100 mm²/min | 0.0645835 ft²/h |