Convert Millinewtons per metre to Joules per square metre
Convert Millinewtons per metre (mN/m) to Joules per square metre (J/m²) instantly and accurately.
Conversion Formula
J/m² = mN/m × 0.001
About Millinewtons per metre
The millinewton per metre (mN/m) equals 10⁻³ N/m, the most widely used practical unit for liquid surface tension worldwide. Water at 20 °C: 72.8 mN/m; ethanol: 22.1 mN/m; mercury: 485 mN/m; olive oil: ~32 mN/m. Numerically identical to dyn/cm, erg/cm² and mJ/m². 1 mN/m = 10⁻³ N/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
| Millinewtons per metre (mN/m) | Joules per square metre (J/m²) |
|---|---|
| 1 mN/m | 0.001 J/m² |
| 2 mN/m | 0.002 J/m² |
| 5 mN/m | 0.005 J/m² |
| 10 mN/m | 0.01 J/m² |
| 25 mN/m | 0.025 J/m² |
| 50 mN/m | 0.05 J/m² |
| 100 mN/m | 0.1 J/m² |