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To calculate the cross sectional area (CSA) of a cable, you have to use a micrometer to verify its diameter, then divide the diameter by two to get the radius (r). With the radius we can calculate the CSA of the cable.

CSA = pi x r2 (Applicable to solid wires only).

For example:
If a cable is 0.5 cm in diameter, its radius is 0.25 cm.

CSA = 0.196349541 cm2

You will need to decide to how many decimal places it is appropriate to quote your answer.

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Q: How do you calculate the cross section area of electrical cable?
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