1. Measure in inches
Measure length and width in inches.
What is an inch-based area measurement?
Square inches equals length times width in inches. Divide square inches by 144 for square feet. A 24 × 36 inch panel equals 864 sq in or 6 sq ft. For mixed feet-and-inches inputs, use the feet and inches calculator; to convert sq ft to sq in, see the sq ft to inches converter.
Getting started
How to Calculate Square Feet from Inches
To calculate square inches, measure length × width in inches. Multiply for square inches. Divide by 144 for square feet. Divide square feet by 9 for square yards.
2. Multiply for sq in
Multiply length × width. A 24 × 36 inch panel equals 864 sq in.
3. Convert to sq ft or sq yd
Divide sq in by 144 for sq ft. Divide sq ft by 9 for sq yd.
Quick reference
Reference
1 acre = 43,560 square feet
1 square yard = 9 square feet
1 square meter = 10.764 square feet
1 square inch = 0.00064516 square feet
FAQ
Frequently Asked Questions
How do I convert square inches to square feet?
Divide the number of square inches by 144 to get square feet. There are 144 square inches in one square foot (12 × 12 = 144). For example, 576 square inches ÷ 144 = 4 square feet.
How many square inches are in a square foot?
There are exactly 144 square inches in one square foot. This is because 1 foot = 12 inches, and 12 × 12 = 144.
How do I calculate square footage from inches?
Multiply the length in inches by the width in inches to get square inches. Then divide by 144 to convert to square feet. For example, 24 in × 36 in = 864 sq in ÷ 144 = 6 square feet.
What is 24 × 24 inches in square feet?
24 × 24 inches = 576 square inches = 4 square feet. This is a common tile size (24-inch tile). Divide 576 by 144 to convert to square feet.
When should I measure in inches instead of feet?
Measure in inches for small areas like tiles, countertop sections, craft projects, small shelves, or any surface under 4 square feet. Inches give more precision for detail work where fractions of a foot matter.
How do I calculate the area of a small circle in square feet from inches?
Measure the diameter in inches, divide by 2 to get the radius, then use Area = π × r². Divide the result by 144 to convert square inches to square feet. A 30-inch diameter circle has an area of about 4.91 sq ft.
REFERENCES
Further Reading & References
Trusted external sources and related sections on this site. External links open authoritative references on Wikipedia and government agencies.
Explore this Square Foot Calculator site
Authoritative external references
- WIKIInch — Wikipedia
- WIKIImperial units — Wikipedia
- GOVNIST Weights & Measures