millinewton per meter
Spring constantSurface tensionexact by definition
The millinewton per metre is 10⁻³ N/m, exact by prefix. It is the stiffness scale of soft atomic force microscope cantilevers, optical traps and biological molecules under load, where a single protein unfolds against forces of tens of piconewtons.
| 1 (Spring constant) | 0.001 |
| 1 (Surface tension) | 1 |
As a unit of surface tension
The millinewton per metre is exactly 0.001 N/m, an exact prefix relation. It is the standard modern unit for surface tension because it puts common liquids in a readable range: water is 72.8 mN/m at 20 °C, ethanol 22.3, and mercury about 486.
One millinewton per meter in every spring constant unit
| 1 | millinewton per meter (mN/m)this unit | |
| 0.001 | newton per meter (N/m) | |
| 0.0000685218 | pound-force per foot (lbf/ft) | |
| 0.00001 | newton per centimeter (N/cm) | |
| 0.00000571015 | pound-force per inch (lbf/in) | |
| 0.00000101972 | kilogram-force per centimeter (kgf/cm) | |
| 0.000001 | kilonewton per meter (kN/m) | |
| 0.000001 | newton per millimeter (N/mm) | |
| 1.01972e-07 | kilogram-force per millimeter (kgf/mm) | |
| 6.85218e-08 | kip per foot (kip/ft) | |
| 5.71015e-09 | kip per inch (kip/in) | |
| 1.00000e-09 | meganewton per meter (MN/m) |
One millinewton per meter in every surface tension unit
| 1,000 | micronewton per meter (μN/m) | |
| 1 | millinewton per meter (mN/m)this unit | |
| 1 | dyne per centimeter (dyn/cm) | |
| 1 | millijoule per square meter (mJ/m²) | |
| 1 | erg per square centimeter (erg/cm²) | |
| 0.00101972 | gram-force per centimeter (gf/cm) | |
| 0.001 | newton per meter (N/m) | |
| 0.001 | joule per square meter (J/m²) | |
| 0.0000685218 | pound-force per foot (lbf/ft) | |
| 0.00000571015 | pound-force per inch (lbf/in) |
Solvers that use spring constant