Area Calculator

Calculate rectangular area and perimeter in your chosen unit.

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Enter your numbers.

Behind the answer

How to calculate

Area = length × width; perimeter = 2 × (length + width)

A 5 by 3 rectangle has an area of 15 square units.

Use the same unit for both dimensions. This tool handles rectangles only.

Results display up to 8 decimal places; exported numbers preserve calculation precision. This is a calculation summary, not an official certificate.