Convert between metric and imperial units, including fractions, for everyday electrical work.
Electrical work moves between metric and imperial constantly: metres and feet, millimetres and inches, square millimetres and kcmil, degrees Celsius and Fahrenheit. This converter handles the units an electrician actually uses, including fractional inches, which most general converters get wrong.
Conductor cross-sectional area is a common source of confusion because it appears as square millimetres, thousands of circular mils, and circular mils depending on which code and catalogue you are reading. The converter bridges all three.
A conductor listed as 250 kcmil is 250,000 circular mils, which is about 127 square millimetres. If a spec sheet gives you 35 square millimetres and your code table is in kcmil, the converter turns that into roughly 69 kcmil so you can match sizes across the two systems.
The CEC works primarily in metric with conductor sizes in AWG and kcmil, while the NEC and much of the North American supply chain use AWG, kcmil, and imperial dimensions. Converting cleanly between them avoids the sizing errors that creep in when a metric spec meets an imperial catalogue. No code table is reproduced here; this is unit math.
One kcmil is about 0.507 square millimetres. So 250 kcmil is roughly 127 square millimetres. The converter does this directly for any conductor size.
A circular mil is the area of a circle one thousandth of an inch in diameter. It is the traditional North American unit for conductor cross-sectional area, and kcmil is simply thousands of circular mils.
Yes. It converts fractional inches directly, which matters for conduit and box measurements where fractions are the working unit, not decimals.
Different codes and catalogues use square millimetres, kcmil, or circular mils. Converting between them lets you match a metric spec to an imperial product without a sizing error.