Convert Square inches per minute to Square millimetres per minute
Convert Square inches per minute (in²/min) to Square millimetres per minute (mm²/min) instantly and accurately.
Conversion Formula
mm²/min = in²/min × 645.16
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.
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 minute (in²/min) | Square millimetres per minute (mm²/min) |
|---|---|
| 1 in²/min | 645.16 mm²/min |
| 2 in²/min | 1290.32 mm²/min |
| 5 in²/min | 3225.8 mm²/min |
| 10 in²/min | 6451.6 mm²/min |
| 25 in²/min | 16129 mm²/min |
| 50 in²/min | 32258 mm²/min |
| 100 in²/min | 64516 mm²/min |