Calculate square inches from length and width with conversions to square feet, square centimetres, and square metres.
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Also in Dimensions & Conversions
Area Measurement
A square inches calculator determines the area of a rectangular surface from length and width in inches. It is used for small-scale measurements such as screen size, label area, tile pieces, and craft projects.
Multiply the length by the width, both measured in inches. The result is the area in square inches. To convert to square feet, divide by 144. To convert to square centimetres, multiply by 6.4516.
Square inches = Length (in) x Width (in)
Multiply length and width in inches to get area in square inches.
There are 144 square inches in one square foot (12 x 12). One square inch equals approximately 6.452 square centimetres. These conversions are useful for comparing specifications across metric and imperial systems or scaling up from small measurements to larger project areas.
Frequently asked questions
There are 144 square inches in one square foot, because 12 x 12 equals 144.
Multiply the square inches by 6.4516 to get square centimetres.
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