Square Area Calculator
Compute the area of a square from its side length: A = side².
Calculator
Use the Square Area Calculator
Result
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Formula
A = side²
Step-by-step
- 1
Enter the side
Any positive length.
- 2
Read the area
Area in square units.
Worked example
Example input: a: 4
Result: 16
Related tools
- Square Perimeter
Distance around the square.
Frequently asked questions
What is the area formula for a square?
A = side² — the side multiplied by itself. A square with 5-unit sides encloses 25 square units. Only one measurement is needed because all four sides of a square are equal. A 10-unit square covers exactly 100 square units.
Why are area answers in square units?
Area counts how many 1 × 1 tiles fit inside the shape, so the unit is squared. A 4-unit square has the curious property that its area and perimeter are both 16 — but one counts flat tiles and the other counts distance.
Is a square a rectangle?
Yes — a square is a rectangle whose sides are all equal. The rectangle formula length × width still works and collapses to side × side. For shapes with unequal sides, use the rectangle calculator instead.