Square Inches to Square Feet Converter

How to convert square inches to square feet

1 square inch = 0.0069444444 square feet. To convert square inches to square feet, divide by 144 (or multiply by 0.0069444444). A square inch is a 1 in × 1 in square, exactly 6.4516 cm². A square foot is a 1 ft × 1 ft square, exactly 0.09290304 m².

Worked examples

• 144 square inches = 1 ft² (144 ÷ 144)
• 500 square inches = 3.47222 ft² (500 ÷ 144)
• 1,000 square inches = 6.94444 ft² (1,000 ÷ 144)

Where this conversion comes up

Square inches are used for countertops, tile, paper and screen sizes in the US; square feet for home and apartment sizes, flooring and paint coverage in the US. A square foot is 144 square inches (12 × 12), so a 24 in × 36 in poster is 864 in², exactly 6 ft². Countertops and tile are priced per square foot but measured in inches.

Quick estimate

Divide by 144, or by 150 and add 4%.

Common mistakes

• Multiplying instead of dividing. A square foot is larger than a square inch, so the number of square feet must come out smaller: 144 square inches = 1 ft².
• Rounding too early. Keep the full factor until the last step; rounding 0.00694 to 0.007 first puts large values noticeably off.

Related area converters: acres to square feet, hectares to acres, acres to hectares, square feet to square meters, square meters to square feet, square feet to acres.