Convert Square inches per second to Square feet per hour
Convert Square inches per second (in²/s) to Square feet per hour (ft²/h) instantly and accurately.
Conversion Formula
ft²/h = in²/s × 25
About Square inches per second
The square inch per second (in²/s) equals 0.0254² = 6.4516 × 10⁻⁴ m²/s. It is the coherent FPS kinematic unit based on the inch, found in US fluid power, hydraulics, and bearing-design references. 1 in²/s = 645.16 cSt = 6.4516 St.
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 inches per second (in²/s) | Square feet per hour (ft²/h) |
|---|---|
| 1 in²/s | 25 ft²/h |
| 2 in²/s | 50 ft²/h |
| 5 in²/s | 125 ft²/h |
| 10 in²/s | 250 ft²/h |
| 25 in²/s | 625 ft²/h |
| 50 in²/s | 1250 ft²/h |
| 100 in²/s | 2500 ft²/h |