Convert Micronewtons per metre to Millijoules per square metre
Convert Micronewtons per metre (µN/m) to Millijoules per square metre (mJ/m²) instantly and accurately.
Conversion Formula
mJ/m² = µN/m × 0.001
About Micronewtons per metre
The micronewton per metre (µN/m) equals 10⁻⁶ N/m, used in precision thin-film capillarity studies and cryogenic surface-tension measurements. Liquid helium-4 at 2 K has a surface tension of ~0.37 mN/m (370 µN/m); liquid ³He near absolute zero is even lower. Numerically identical to µJ/m². 1 µN/m = 10⁻³ mN/m.
About Millijoules per square metre
The millijoule per square metre (mJ/m²) equals 10⁻³ N/m - the SI surface-energy-per-area form, numerically identical to mN/m and dyn/cm. The preferred notation in materials science for solid surface energy and work of adhesion: polypropylene ~30 mJ/m², epoxy ~45 mJ/m², steel ~2 000 mJ/m². 1 mJ/m² = 1 mN/m = 1 dyn/cm.
Quick Reference Table
| Micronewtons per metre (µN/m) | Millijoules per square metre (mJ/m²) |
|---|---|
| 1 µN/m | 0.001 mJ/m² |
| 2 µN/m | 0.002 mJ/m² |
| 5 µN/m | 0.005 mJ/m² |
| 10 µN/m | 0.01 mJ/m² |
| 25 µN/m | 0.025 mJ/m² |
| 50 µN/m | 0.05 mJ/m² |
| 100 µN/m | 0.1 mJ/m² |