Cross-Sectional Area Calculator

Cross-Sectional Area Calculator

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How to calculate

Enter the electric current value in amperes (A) , Select the cross-sectional area sources. Then click on " Calculate " button

Calculator Box

A

-- Cross Sectional Area -- 0 - 6 mm² 6 - 16 mm² 16 - 50 mm² 50 - 120 mm² 120 - 240 mm² 240 mm² Up to

A/mm²

mm²

To convert amperes (A) and cross-sectional area (S) , you need to know the electric current rating and the current density rating . Use these formulas for quick conversions from A to MM². Here are the formulas:

\[ \text{S} =\frac{ I}{J} \]

Unit of Measurement:

- \(J\) is the current density (measured in amperes per square milimeter , A/mm²),
- \(I\) is the electric current (measured in amperes, A),
- \(S\) is the cross-sectional area through which the current flows (measured in square meters, m²).

Current Density Table

Current Density J (A/mm2)	Cross-Sectional Area(mm2)
5 A/mm2	0-6 mm2
4 A/mm2	6-16 mm2
3 A/mm2	16-50 mm2
2 A/mm2	50-120 mm2
1.5 A/mm2	120-240 mm2
1 A/mm2	240 mm2 Up to

Practical Examples

Let's say we have a three phase motor run on electric current 100A, The cross-sectional area calculated as follows:

\[ \text{S} =\frac{100{A}}{3 \text{ A/mm}^2}= \text{33.33} \text{ mm}^2 \]

Therefore, the cross-sectional area in this three phase is 35 mm².

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