Square Inches to Square Feet Converter

What is a square inches to square feet converter?

A square inches to square feet converter changes an area measured in square inches (in²) into the equivalent area expressed in square feet (ft²). Square inches are handy for small surfaces such as tiles, screens, or fabric swatches, while square feet are the standard unit for rooms, floors, and building plans. Because both units describe the same physical area, the conversion is a simple, exact ratio.

Formula

A foot equals 12 inches, so a square foot equals 12 × 12 = 144 square inches. The conversion is therefore:

$\text{ft}^2 = \frac{\text{in}^2}{144}$

Equivalently, multiply by the decimal factor:

$\text{ft}^2 = \text{in}^2 \times 0.00694444$

How to convert square inches to square feet

1. Take your area value in square inches.
2. Divide it by 144 (the number of square inches in one square foot).
3. The result is the area in square feet.

The base factor: 1 square inch = 0.00694444 square feet, and conversely 1 square foot = 144 square inches.

Worked examples

Example 1: 1 in² to ft²

$1 \div 144 = 0.00694444 \text{ ft}^2$

So one square inch is about 0.00694444 square feet.

Example 2: 1 ft² back to in² (reverse)

$1 \times 144 = 144 \text{ in}^2$

So one square foot equals exactly 144 square inches.

Example 3: 720 in² to ft²

$720 \div 144 = 5 \text{ ft}^2$

A 720 square inch surface covers exactly 5 square feet.

FAQ

How many square inches are in a square foot?

There are exactly 144 square inches in one square foot, because a foot is 12 inches and 12 × 12 = 144.

Why isn’t the factor just 12?

Twelve is the linear ratio between feet and inches. Area scales with the square of the length ratio, so you multiply 12 by 12 to get 144 for square units.

For related area conversions, see the square feet to acres converter and the acres to square feet converter.