Square Feet Calculator
Enter the length and width of any space to instantly calculate its area in square feet, plus square meters, square yards, and acres.
How to calculate square feet
Convert both measurements to feet first, then multiply them together. If your measurements are in inches, divide each by 12 to get feet before multiplying (or multiply the two inch values and divide by 144).
Square Feet = Length (ft) × Width (ft)
Worked example
A room that is 12 feet long and 10 feet wide.
- Length = 12 ft
- Width = 10 ft
- Area = 12 × 10
Result: 120 square feet
Frequently asked questions
How do I calculate square feet?
Measure the length and width of the area in feet, then multiply them together. For example, a room 12 ft by 10 ft is 12 × 10 = 120 square feet.
How do I convert inches to square feet?
Divide each measurement by 12 to convert it to feet, then multiply. Alternatively, multiply the two measurements in inches and divide the result by 144 (since 1 square foot = 144 square inches).
How many square feet is a 10x10 room?
A room that is 10 feet by 10 feet is 100 square feet (10 × 10 = 100).
How do I find the square footage of an irregular room?
Break the space into simple rectangles, calculate the square footage of each rectangle separately, then add the results together to get the total area.
How do I convert square feet to square meters?
Multiply the number of square feet by 0.0929 to get square meters.
How many square feet are in an acre?
One acre is 43,560 square feet.