Maryland Metrics
Wire gauge, tensile-strength, DC-resistance calculation
size (input size value)
unit (select AWG, mil, mm, CM (circular mil) or sq-mm)
construction (select solid or stranded)

Input size value and section unit and construction,
then press "compute" to get converted values. For larger sizes over 0 AWG, use 2/0, 3/0, 4/0 .. etc.

Note: Result will open in a new page.

Please use your back button to return to the prior page.
A typical result will look like this:
conductor size      28 AWG
area             0.081 mm^2 (square-mm)
area             159.8 CM (circular mil)
diameter          12.6 mil (1)
diameter         0.321 mm (1)
DC-resistance    0.213 Ohm/m
tensil strength   2.43 kgf (2)
weight           0.720 kg/km (Cu)
weight           0.219 kg/km (Al)

construction: solid

1. diameter of stranded conductor is an approximation.
2. tensil strength of crimped terminal is about 60 % of conductor.
Ordinarily, the next two gauging systems are used with electrical wire and cables.

AWG (American Wire Gauge)

It is known as BS (Brown & Sharp wire gauge). The AWG gauging system
is defined as geometrical progression because of the drawing mechanism.
The 36 AWG is defined as 5 mil diameter, and the 4/0 AWG is defined as
460 mil diameter. (See ASTM B 258)


represents diameter of solid wire in mil (1/1000 inch) or cross-sectional area in circular mil.

millimeter wire gauging system

represents the diameter of solid wire in mm or
cross-sectional area of
stranded wire in mm^2 (square mm).

Most conductors are composed of copper. Most important parameter of conductors is the cross section which
determines DC-resistance and most of current carrying capacity.

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