Convert Square feet per hour to Square metres per second
Convert Square feet per hour (ft²/h) to Square metres per second (m²/s) instantly and accurately.
Conversion Formula
m²/s = ft²/h × 2.580640000e-5
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 metres per second
The square metre per second (m²/s) is the SI unit for thermal diffusivity (α = k / ρc_p). It defines how fast a temperature disturbance propagates through a material. Diamond: ≈5 × 10⁻⁴ m²/s; silver: ≈1.65 × 10⁻⁴ m²/s; aluminium: ≈8.4 × 10⁻⁵ m²/s; iron: ≈1.8 × 10⁻⁵ m²/s; concrete: ≈6 × 10⁻⁷ m²/s; water: ≈1.4 × 10⁻⁷ m²/s. 1 m²/s = 10⁶ mm²/s = 10⁴ cm²/s.
Quick Reference Table
| Square feet per hour (ft²/h) | Square metres per second (m²/s) |
|---|---|
| 1 ft²/h | 2.581 × 10-5 m²/s |
| 2 ft²/h | 5.161 × 10-5 m²/s |
| 5 ft²/h | 0.000129032 m²/s |
| 10 ft²/h | 0.000258064 m²/s |
| 25 ft²/h | 0.00064516 m²/s |
| 50 ft²/h | 0.00129032 m²/s |
| 100 ft²/h | 0.00258064 m²/s |