Convert Square feet per hour to Square inches per minute
Convert Square feet per hour (ft²/h) to Square inches per minute (in²/min) instantly and accurately.
Conversion Formula
in²/min = ft²/h × 2.4
About Square feet per hour
The square foot per hour (ft²/h) equals ≈2.581 × 10⁻⁵ m²/s and is the dominant unit in US engineering practice for thermal diffusivity of building materials and industrial insulation. ASHRAE handbooks, Perry's Chemical Engineers' Handbook, and NFPA fire-resistance tables all list diffusivity in ft²/h. Steel: ≈0.4-0.5 ft²/h; concrete: ≈0.023 ft²/h; mineral wool: ≈0.005 ft²/h. 1 ft²/h = 0.09290304/3600 m²/s.
About Square inches per minute
The square inch per minute (in²/min) equals ≈1.075 × 10⁻⁵ m²/s, found in US military and aerospace specifications for thermal protection materials and ablative heat shields. Some NASA technical reports on reentry vehicle TPS (Thermal Protection System) materials quote diffusivity in in²/min. 1 in²/min = 0.00064516/60 m²/s.
Quick Reference Table
| Square feet per hour (ft²/h) | Square inches per minute (in²/min) |
|---|---|
| 1 ft²/h | 2.4 in²/min |
| 2 ft²/h | 4.8 in²/min |
| 5 ft²/h | 12 in²/min |
| 10 ft²/h | 24 in²/min |
| 25 ft²/h | 60 in²/min |
| 50 ft²/h | 120 in²/min |
| 100 ft²/h | 240 in²/min |