Convert Square millimetres per hour to Square feet per minute
Convert Square millimetres per hour (mm²/h) to Square feet per minute (ft²/min) instantly and accurately.
Conversion Formula
ft²/min = mm²/h × 1.793985069e-7
About Square millimetres per hour
The square millimetre per hour (mm²/h) equals 1/3 600 000 000 m²/s, the smallest practical thermal diffusivity unit. It is used in very slow heat-transfer processes such as diffusion through frozen soils or phase-change materials studied over many hours. Heavy clay soils can show diffusivity values of 1-2 mm²/h. 1 mm²/h = 1e-6/3600 m²/s.
About Square feet per minute
The square foot per minute (ft²/min) equals ≈1.548 × 10⁻³ m²/s, an uncommon transitional unit appearing in some older US industrial furnace design charts and heat-treatment process sheets where holding times are expressed in minutes. 1 ft²/min = 60 ft²/h = 0.09290304/60 m²/s ≈1.548 × 10⁻³ m²/s.
Quick Reference Table
| Square millimetres per hour (mm²/h) | Square feet per minute (ft²/min) |
|---|---|
| 1 mm²/h | 1.794 × 10-7 ft²/min |
| 2 mm²/h | 3.588 × 10-7 ft²/min |
| 5 mm²/h | 8.97 × 10-7 ft²/min |
| 10 mm²/h | 1.794 × 10-6 ft²/min |
| 25 mm²/h | 4.485 × 10-6 ft²/min |
| 50 mm²/h | 8.97 × 10-6 ft²/min |
| 100 mm²/h | 1.794 × 10-5 ft²/min |