Convert Pounds-force per foot to Millinewtons per metre
Convert Pounds-force per foot (lbf/ft) to Millinewtons per metre (mN/m) instantly and accurately.
Conversion Formula
mN/m = lbf/ft × 14593.90294
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 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.
Quick Reference Table
| Pounds-force per foot (lbf/ft) | Millinewtons per metre (mN/m) |
|---|---|
| 1 lbf/ft | 14593.9 mN/m |
| 2 lbf/ft | 29187.8 mN/m |
| 5 lbf/ft | 72969.5 mN/m |
| 10 lbf/ft | 145939 mN/m |
| 25 lbf/ft | 364848 mN/m |
| 50 lbf/ft | 729695 mN/m |
| 100 lbf/ft | 1459390 mN/m |