Convert Joules per square metre to Pounds-force per foot
Convert Joules per square metre (J/m²) to Pounds-force per foot (lbf/ft) instantly and accurately.
Conversion Formula
lbf/ft = J/m² × 0.06852176586
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.
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.
Quick Reference Table
| Joules per square metre (J/m²) | Pounds-force per foot (lbf/ft) |
|---|---|
| 1 J/m² | 0.0685218 lbf/ft |
| 2 J/m² | 0.137044 lbf/ft |
| 5 J/m² | 0.342609 lbf/ft |
| 10 J/m² | 0.685218 lbf/ft |
| 25 J/m² | 1.71304 lbf/ft |
| 50 J/m² | 3.42609 lbf/ft |
| 100 J/m² | 6.85218 lbf/ft |