How to convert AWG to mm

When you want to calculate AWG from diameter (in mm) or cross sectional area  (in mm²), the values are generally  rounded of to the nearest AWG equivalents.

Wire diameter calculation

The n gauge wire diameter dn in millimeters (mm) is equivalent to:

dn (mm) = 0.127 mm × 92(36-n)/39

0.127mm is the diameter of gauge #36.

Wire cross sectional area calculation

The n gauge wire’s cross sectional area An in square millimeters (mm2) is given by the formula:

An (mm2) = (π/4)×dn2 = 0.012668 mm2 × 92(36-n)/19.5