pakmath.com

Square Feet to Square Inches (ft² to in²) Converter

1 square foot (ft²) = 144 square inches (in²). To convert square feet to square inches, multiply by 144: 1000 ft² × 144 = 144,000 in². Also searched as sq ft to square inch, sqft to square inch.

1 ft² = 144 in²
Convert the other way: Square Inches to Square Feet

Quick facts

How to convert square feet to square inches

  1. Take the value in square feet.
  2. Multiply it by 144 (the number of square inches in one square foot).
  3. Round the result to the precision you need.
in² = ft² × 144

Worked example (a small apartment): 1000 ft² × 144 = 144000 in².

To convert square inches back to square feet, multiply by 0.00694444, or divide by 144.

Source: NIST SP 811 (2008). Marla and kanal use the Punjab standard stated in their definitions; local sizes can differ.

Square Feet to Square Inches conversion table

Square Feet to Square Inches conversion table
Square Feet [ft²]Square Inches [in²]
0.01 ft²1.44 in²
0.1 ft²14.4 in²
1 ft²144 in²
2 ft²288 in²
3 ft²432 in²
5 ft²720 in²
10 ft²1440 in²
20 ft²2880 in²
50 ft²7200 in²
100 ft²14400 in²
1000 ft²144000 in²

ft² to in² chart from 1 to 100

Square Inches to Square Feet conversion table

Square Inches to Square Feet conversion table
Square Inches [in²]Square Feet [ft²]
0.01 in²0.0000694444 ft²
0.1 in²0.0006944444 ft²
1 in²0.0069444444 ft²
2 in²0.0138888889 ft²
3 in²0.0208333333 ft²
5 in²0.0347222222 ft²
10 in²0.0694444444 ft²
20 in²0.1388888889 ft²
50 in²0.3472222222 ft²
100 in²0.6944444444 ft²
1000 in²6.9444444444 ft²

Square Feet vs Square Inches

Square FootSquare Inch
Symbolft²in²
Equals1 ft² = 144 in²1 in² = 0.00694444 ft²

What is a square foot?

The area of a square with 1-foot sides. The standard unit for home and floor space in the US.

What is a square inch?

The area of a square with 1-inch sides. Used in the US for small material and screen surface areas.

Frequently asked questions

How many square inches are in a square foot?

There are 144 square inches in 1 square foot (1 ft² = 144 in²).

How many square feet are in a square inch?

There are 0.00694444 square feet in 1 square inch (1 in² = 0.0069444444 ft²).

How do I convert square feet to square inches?

Multiply the number of square feet by 144. For example, 10 ft² × 144 = 1,440 in². To convert back, multiply by 0.00694444.

What is 10 ft² in square inches?

10 ft² = 1,440 in².

What is 100 ft² in square inches?

100 ft² = 14,400 in².

Is the conversion exact?

Yes. The factor comes from the official definitions of both units (NIST SP 811 (2008). Marla and kanal use the Punjab standard stated in their definitions; local sizes can differ). Results are shown to up to 10 decimal places; round them to suit your purpose.

Popular area conversions

Convert square feet to other units

Convert other units to square inches

Open the full area converter with every unit →

Related converters

Reviewed by

Dr. Muhammad Amjad Khadim PhD Mathematics

Dr. Muhammad Amjad Khadim holds a PhD in Mathematics. He writes and reviews the guides on pakmath.com and checks every formula, conversion factor and worked example against published standards and official guidance before it goes live. Spotted an error? Tell us and it will be corrected.

Google Scholar profile (opens in a new tab)

First published 28 October 2026 · Last reviewed 5 November 2026