Convert Square millimetres per hour to Square feet per hour
Convert Square millimetres per hour (mm²/h) to Square feet per hour (ft²/h) instantly and accurately.
Conversion Formula
ft²/h = mm²/h × 1.076391042e-5
About Square millimetres per hour
The square millimetre per hour (mm²/h) equals 1/(3.6 × 10⁹) m²/s ≈ 2.78 × 10⁻¹⁰ m²/s. It appears in materials science for solid-state diffusion and thin-film growth studies where hourly timescales are more natural than seconds. 1 mm²/h = 1/3600 mm²/s = 1/3600 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 hour (mm²/h) | Square feet per hour (ft²/h) |
|---|---|
| 1 mm²/h | 1.076 × 10-5 ft²/h |
| 2 mm²/h | 2.153 × 10-5 ft²/h |
| 5 mm²/h | 5.382 × 10-5 ft²/h |
| 10 mm²/h | 0.000107639 ft²/h |
| 25 mm²/h | 0.000269098 ft²/h |
| 50 mm²/h | 0.000538196 ft²/h |
| 100 mm²/h | 0.00107639 ft²/h |