Convert Pounds-force per foot to Joules per square metre
Convert Pounds-force per foot (lbf/ft) to Joules per square metre (J/m²) instantly and accurately.
Conversion Formula
J/m² = lbf/ft × 14.59390294
About Pounds-force per foot
The pound-force per foot (lbf/ft) equals (0.45359237 × 9.80665) / 0.3048 ≈ 14.5939 N/m, used in US reservoir engineering and geotechnical drainage for capillary pressure and interfacial tension data. Drilling muds and reservoir simulation codes (Eclipse, CMG) sometimes report in lbf/ft. 1 lbf/ft ≈ 14.594 N/m ≈ 14 594 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
| Pounds-force per foot (lbf/ft) | Joules per square metre (J/m²) |
|---|---|
| 1 lbf/ft | 14.5939 J/m² |
| 2 lbf/ft | 29.1878 J/m² |
| 5 lbf/ft | 72.9695 J/m² |
| 10 lbf/ft | 145.939 J/m² |
| 25 lbf/ft | 364.848 J/m² |
| 50 lbf/ft | 729.695 J/m² |
| 100 lbf/ft | 1459.39 J/m² |