Convert kcmil to mm2 and mm2 to kcmil (Calculator & Chart)

Use this handy calculator to quickly and accurately convert kcmil to mm2 or mm2 to kcmil

kcmil to mm2 conversion calculator

Note: 1kcmil = 1,000 mil. To convert kcmil to mm2 and mm2 to kcmil, you can use the calculator, the conversion chart, or the formulas.

Worked Examples Using the Calculator:

1. Converting 500 kcmil to mm2:

Using the calculator, 500 kcmil = 253.35 mm2

2. Converting 350 kcmil to mm2, 350 kcmil = 177.34 mm2

3. Convert 250 kcmil to mm2, 250 kcmil = 126.68 mm2

kcmil to mm2 conversion formula

Use the conversion factor, 1 kcmil = 506.7 × 10-3 mm2

  • 500 kcmil = 253.35 mm2, from 500kcmil x 506.7 x 10-3
  • 300 kcmil = 152.01 mm2, from 300kcmil x 506.7 x 10-3

Table: kcmil to mm2 chart

Refer to the table below to find the equivalent cross-sectional area in mm2 from kcmil. The diameters in inches and mm are for a solid (non-stranded rod) for the corresponding area in kcmil and mm2.

Note: 1 kcmil is the same as 1 MCM. MCM is the older unit.

kcmil/MCM (mm2)/sq.mmDiameter (inches)Diameter (mm)
10.50.7980.031
52.51.7850.070
105.02.5240.099
5025.35.6770.224
10050.78.0370.316
15076.09.8390.387
200101.311.3600.447
250126.70.50012.70
300152.00.54813.91
350177.30.59215.03
400202.70.63216.06
500253.40.70717.96
600304.00.77519.67
700354.70.83721.25
750380.00.86622.00
800405.40.89422.72
900456.00.94924.10
1,000506.71.00025.40
1,250633.41.11828.40
1,500760.11.22531.11
1,750886.71.32333.60
2,0001013.41.41435.92

mm2 to kcmil conversion formula

Use the conversion factor, 1 mm2 = 1.97 kcmil

Using the conversion, 1 mm2 = 1.97 kcmil

  • 300 mm2 = 591 kcmil, from (300mm2 x1.97)
  • 500 mm2 = 985 kcmil, from (500mm2 x1.97)
  • 185 mm2 = 365.10 kcmil, from (185mm2 x 1000)/506.7

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