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Rectangle Area Calculator

Calculate rectangle area and perimeter from length and width

Accepts integers or decimals (use a period for decimals).

l (length)w

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Results

Enter values and click Calculate to see the result.

Theory & Formula

A rectangle is a quadrilateral with four right angles and opposite sides equal.

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\(A = l \times w, P = 2(l + w)\)

Worked Examples

Example 1

\(l = 8, w = 5 \rightarrow A = 8 \times 5 = 40\) units², \(P = 2(8 + 5) = 26\) units

Example 2

\(l = 12, w = 3 \rightarrow A = 12 \times 3 = 36\) units², \(P = 2(12 + 3) = 30\) units
Rectangle Area Calculator | MathCalcLab | MathCalcLab