Question 1

How do I calculate square footage?

Accepted Answer

For a rectangle, multiply length × width in feet. For a triangle, use (base × height) ÷ 2. For a circle, use π × radius². Our calculator handles all three shapes with a multi-area adder.

Question 2

How many square feet in an acre?

Accepted Answer

One acre = 43,560 square feet. A football field (including end zones) is approximately 1.32 acres or 57,600 square feet.

Question 3

How do I convert square feet to square yards?

Accepted Answer

Divide square feet by 9 to get square yards. For example, 270 sq ft ÷ 9 = 30 square yards.

Question 4

How do I calculate the square footage of an irregular room?

Accepted Answer

Break the irregular room into rectangles, calculate each section separately, then add them together. Our multi-area calculator makes this easy — just click 'Add Another Area.'

Question 5

How many square feet per square yard?

Accepted Answer

There are 9 square feet in 1 square yard (3 ft × 3 ft = 9 ft²). This is commonly needed for flooring and carpet calculations.

Question 6

How do I calculate square footage for a circular area?

Accepted Answer

Use the formula π × radius². For a 10-foot diameter circle: radius = 5 ft, so π × 5² = 78.54 sq ft.

Question 7

What is the square footage of a 12x12 room?

Accepted Answer

A 12×12 room = 144 square feet. Add 10% for waste when buying flooring materials: 144 × 1.10 = 158.4, so buy 160 sq ft of flooring.

Question 8

How many square feet can a gallon of paint cover?

Accepted Answer

One gallon of paint covers 350–400 square feet for a single coat on smooth walls. Textured surfaces may need more. Plan for 2 coats when changing colors.

Unit	Equals	Use Case
1 square yard	9 sq ft	Carpet, turf
1 square meter	10.76 sq ft	International specs
1 acre	43,560 sq ft	Land measurement
1 hectare	107,639 sq ft	Agriculture
12×12 room	144 sq ft	Standard bedroom

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