Convert Poundals per inch to Joules per square metre
Convert Poundals per inch (pdl/in) to Joules per square metre (J/m²) instantly and accurately.
Conversion Formula
J/m² = pdl/in × 5.44310844
About Poundals per inch
The poundal per inch (pdl/in) equals 0.45359237 × 12 N/m = 5.44310844 N/m exactly (since 0.3048/0.0254 = 12). A foot-pound-second (FPS) unit rarely encountered in modern practice but found in historical US engineering tables predating SI adoption. 1 pdl/in = 5.44310844 N/m ≈ 5 443 mN/m.
About Joules per square metre
The joule per square metre (J/m²) equals 1 N/m exactly - the surface-fracture-energy (G_c) form used in fracture mechanics and wetting thermodynamics. Values: silica glass ~0.8 J/m²; aluminium ~1.4 J/m²; silicon carbide ~10-25 J/m²; tough metals 50-100 J/m². 1 J/m² = 1 N/m = 1 000 mJ/m².
Quick Reference Table
| Poundals per inch (pdl/in) | Joules per square metre (J/m²) |
|---|---|
| 1 pdl/in | 5.44311 J/m² |
| 2 pdl/in | 10.8862 J/m² |
| 5 pdl/in | 27.2155 J/m² |
| 10 pdl/in | 54.4311 J/m² |
| 25 pdl/in | 136.078 J/m² |
| 50 pdl/in | 272.155 J/m² |
| 100 pdl/in | 544.311 J/m² |