Convert Millimetre squared to Foot squared
Convert Millimetre squared (mm²) to Foot squared (ft²) instantly and accurately.
Conversion Formula
ft² = mm² × 1.076391042e-5
About Millimetre squared
The millimetre squared (mm²) equals 10⁻⁶ m² ≈ 1.013 × 10⁹ D, representing extremely high permeabilities beyond the range of most geological materials. It appears in geotechnical research for open rock fractures, coarse gravel channel beds, and large-cell open-foam engineered materials. 1 mm² = 10⁶ µm² = 10⁻⁶ m².
About Foot squared
The square foot (ft²) equals (0.3048 m)² = 9.290 304 × 10⁻² m² ≈ 9.41 × 10¹³ D. An imperial area unit included for unit-conversion completeness; it occasionally appears in US geotechnical reports where flow cross-sections are expressed in square feet. 1 ft² = 144 in² = 9.290 304 × 10⁻² m².
Quick Reference Table
| Millimetre squared (mm²) | Foot squared (ft²) |
|---|---|
| 1 mm² | 1.076 × 10-5 ft² |
| 2 mm² | 2.153 × 10-5 ft² |
| 5 mm² | 5.382 × 10-5 ft² |
| 10 mm² | 0.000107639 ft² |
| 25 mm² | 0.000269098 ft² |
| 50 mm² | 0.000538196 ft² |
| 100 mm² | 0.00107639 ft² |