Convert Square feet per hour to Square feet per second
Convert Square feet per hour (ft²/h) to Square feet per second (ft²/s) instantly and accurately.
Conversion Formula
ft²/s = ft²/h × 0.0002777777778
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 feet per second
The square foot per second (ft²/s) equals 0.09290304 m²/s, the imperial base unit for thermal diffusivity analogous to m²/s. It is used in US aerospace engineering and combustion research for highly conductive materials and high-temperature plasmas. Diamond, the most thermally diffusive solid at ≈7 cm²/s, converts to ≈0.0075 ft²/s; silver to ≈0.00167 ft²/s. 1 ft²/s = 3600 ft²/h = 0.09290304 m²/s.
Quick Reference Table
| Square feet per hour (ft²/h) | Square feet per second (ft²/s) |
|---|---|
| 1 ft²/h | 0.000277778 ft²/s |
| 2 ft²/h | 0.000555556 ft²/s |
| 5 ft²/h | 0.00138889 ft²/s |
| 10 ft²/h | 0.00277778 ft²/s |
| 25 ft²/h | 0.00694444 ft²/s |
| 50 ft²/h | 0.0138889 ft²/s |
| 100 ft²/h | 0.0277778 ft²/s |