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Square Inches Calculator

Formula

The formula to convert inches to square inches is:

$SI = L \times W$

Where:

SI is the area in square inches (in²)
L is the length in inches (in)
W is the width in inches (in)

What are Square Inches?

Square inches are a unit of area that describes a total area equal to 1 inch in length and 1 inch in width, hence the name, square inches. Square inches are denoted with the symbol in².

Example Calculation

Let's assume the following values:

Length: 5 inches
Width: 4 inches

Step 1: Multiply the length by the width:

$5 \times 4 = 20$

The area in square inches (SI) is 20 in².