Convert Square inches per hour to Square millimetres per minute
Convert Square inches per hour (in²/h) to Square millimetres per minute (mm²/min) instantly and accurately.
Conversion Formula
mm²/min = in²/h × 10.75266667
About Square inches per hour
The square inch per hour (in²/h) equals ≈1.792 × 10⁻⁷ m²/s, used in US heat-transfer handbooks and HVAC insulation specifications. Pre-SI tables for building insulation board and refractory brick often list thermal diffusivity in in²/h. Firebrick: ≈3.5 in²/h; rigid foam: ≈0.8-1.2 in²/h. 1 in²/h = 0.00064516/3600 m²/s.
About Square millimetres per minute
The square millimetre per minute (mm²/min) equals 1/60 000 000 m²/s. It appears in material testing standards where thermal diffusivity of polymers and composites is measured over minute-scale heating pulses. ASTM and ISO laser-flash methods sometimes report in mm²/min as an intermediate step. 1 mm²/min = 1e-6/60 m²/s ≈ 1.667 × 10⁻¸ m²/s.
Quick Reference Table
| Square inches per hour (in²/h) | Square millimetres per minute (mm²/min) |
|---|---|
| 1 in²/h | 10.7527 mm²/min |
| 2 in²/h | 21.5053 mm²/min |
| 5 in²/h | 53.7633 mm²/min |
| 10 in²/h | 107.527 mm²/min |
| 25 in²/h | 268.817 mm²/min |
| 50 in²/h | 537.633 mm²/min |
| 100 in²/h | 1075.27 mm²/min |