Square Footage Calculator
Calculate the area of rectangles, circles, and triangles, with metric and imperial unit switching.
Frequently Asked Questions
How do I calculate the square footage of a room?+
Measure the room's length and width in feet, then multiply them together. For example, a 12-foot by 10-foot room is 120 square feet. If the room is not a simple rectangle, break it into smaller rectangles, calculate each area, and add them together.
How many square feet are in an acre?+
There are exactly 43,560 square feet in an acre. To convert square feet to acres, divide the square feet by 43,560. For example, 10,000 square feet is approximately 0.23 acres.
How do I convert square feet to square meters?+
Multiply square feet by 0.0929 to get square meters. For example, 500 square feet is approximately 46.45 square meters. To convert from square meters to square feet, multiply by 10.764.
How do I calculate the square footage of an irregularly shaped room?+
Break the irregular shape into standard geometric shapes such as rectangles, triangles, or circles. Calculate the area of each shape separately, then add them all together. This calculator's L-shaped mode and room calculator make common layouts simple.
How much flooring do I need? Should I buy extra?+
Calculate the total square footage of all rooms to be floored. Standard practice is to add 10% extra material for waste from cuts, mistakes, and future repairs. For diagonal or pattern installations, add 15-20% extra material.
What is the difference between square feet and linear feet?+
Linear feet measure length in a straight line (one dimension), while square feet measure area (two dimensions). For example, a board 1 foot wide and 8 feet long is 8 linear feet and also 8 square feet. Knowing the difference matters when buying materials.