Conversion method: know the square of the wire, calculate the radius of the wire using the formula for calculating the circular area: square number of wires (mm2)=pi (3.14) × Square of wire radius (mm)

Knowing the square of the wire, the same is true for calculating the wire diameter. For example, the wire diameter of 2.5 square wire is 2.5 ÷ 3.14=0.8, and then the square root is 0.9 mm, so the wire diameter of 2.5 square wire is: 2 × 0.9 mm=1.8 mm.

Knowing the diameter of the wire, the square of the wire can also be calculated by the formula of circular area: square of the wire=pi (3.14) × Square of wire diameter/4

The cable size is also nominal by square, and the multi strand wire is the sum of the sectional areas of each conductor. Calculation formula of cable sectional area: 0.7854 × Square of wire radius (mm) ×& nbsp; Number of strands, such as 48 strands (wire radius 0.2 mm per strand) 1.5 square meters of wire: 0.785 × （0.2 × 0.2） × 48=1.5 square