# What is a Square Inch? Definition and Examples

What is a square inch? Or more precisely, what is 1 square inch? 1 square inch is the area of a square having a side length of 1 inch. The figure below shows a square that has an area of 1 square inch. The square inch is a unit for measuring areas that are very small in the customary system of measurement and it can also be written as in.2

## How big is a square inch? Things in real life that have an area approximately equal to 1 square inch

• 1 square inch is about the area 4 of the number buttons on your computer keyboard will occupy.
• 1 square inch is about the area a 9V battery will occupy.
• 1 square inch is about the area of 2 nickels.

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