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.

Square inches per minute (in²/min)
Square millimetres per minute (mm²/min)

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/min645.16 mm²/min
2 in²/min1290.32 mm²/min
5 in²/min3225.8 mm²/min
10 in²/min6451.6 mm²/min
25 in²/min16129 mm²/min
50 in²/min32258 mm²/min
100 in²/min64516 mm²/min

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