erg/cm2\text{erg/cm}^{2}

erg per square centimeter

Surface tensionexact by definition

The erg per square centimetre is the CGS surface energy unit, exactly 10⁻³ N/m, and numerically equal to both the dyne per centimetre and the millinewton per metre. Water at 20 °C is 72.8 erg/cm², the same number as 72.8 mN/m.

Watch out: The numerical identity of dyn/cm, erg/cm² and mN/m is the reason surface tension values have survived unchanged through every unit reform. A table from 1930 in dyn/cm can be read directly as mN/m with no conversion at all.

1 erg/cm2\text{erg/cm}^{2} 1 mN/m\text{mN/m}

One erg per square centimeter in every surface tension unit

1,000micronewton per meter (μN/m)
1millinewton per meter (mN/m)
1dyne per centimeter (dyn/cm)
1millijoule per square meter (mJ/m²)
1erg per square centimeter (erg/cm²)this unit
0.00101972gram-force per centimeter (gf/cm)
0.001newton per meter (N/m)
0.001joule per square meter (J/m²)
0.0000685218pound-force per foot (lbf/ft)
0.00000571015pound-force per inch (lbf/in)