Convert Inch squared to Darcy
Convert Inch squared (in²) to Darcy (D) instantly and accurately.
Conversion Formula
D = in² × 653708370
About Inch squared
The square inch (in²) equals (0.0254 m)² = 6.4516 × 10⁻⁴ m² ≈ 6.54 × 10¹¹ D. An imperial area unit included for unit-conversion completeness; it appears in some US oil-country tubular goods and industrial filter-media specifications where flow cross-sections are stated in square inches. 1 in² ≈ 6.452 cm² = 6.4516 × 10⁻⁴ m².
About Darcy
The darcy (D) ≈ 9.869 × 10⁻¹³ m², the oilfield-standard permeability unit defined by Darcy's law: 1 D passes 1 cm³/s of 1 cP fluid through 1 cm² cross-section under a 1 atm/cm gradient. Highly permeable consolidated sandstone: 1-5 D; unconsolidated sand: 5-20 D. 1 D = 1 000 mD ≈ 0.9869 µm².
Quick Reference Table
| Inch squared (in²) | Darcy (D) |
|---|---|
| 1 in² | 653708000 D |
| 2 in² | 1.307 × 109 D |
| 5 in² | 3.269 × 109 D |
| 10 in² | 6.537 × 109 D |
| 25 in² | 1.634 × 1010 D |
| 50 in² | 3.269 × 1010 D |
| 100 in² | 6.537 × 1010 D |