Calculate room and area square footage accurately for flooring, painting, and construction projects. Free, fast, and precise measurements for any space.
Multiply the length by the width to get the total square footage. Works for rectangles and squares.
Enter dimensions to calculate square footage
Square footage (also called square feet or sq ft) is a unit of area measurement commonly used in the United States and other countries. It represents the area of a square with sides that are exactly one foot long.
Understanding square footage is essential for numerous applications including:
Use a tape measure to measure the longest side of the room in feet.
Measure the perpendicular side in feet.
Length × Width = Square Footage
Calculate each room separately and sum for total area.
Break the room into smaller rectangles, triangles, or circles. Calculate the square footage of each section separately, then add them together for the total area. For very irregular shapes, consider hiring a professional surveyor.
Yes, closets are typically included in a room’s square footage if they’re accessible from the room and have standard ceiling height. Walk-in closets are definitely included.
Always add 10-15% extra for waste, cuts, and mistakes. For patterned materials like tile or patterned carpet, add 15-20% extra to account for pattern matching.
Square feet measures area (length × width) in two dimensions, while cubic feet measures volume (length × width × height) in three dimensions. Use square feet for floor area, cubic feet for room volume or storage capacity.
For general estimates, measuring to the nearest inch is sufficient. For precise material orders or construction, measure to 1/8th inch accuracy. Use a quality tape measure and have someone help for best results.
Absolutely! This calculator works for any flat surface including patios, decks, driveways, lawns, and gardens. Just measure in feet and calculate the same way.
“This calculator saved me so much time! I was able to order the exact amount of flooring I needed without over-buying. Super accurate and easy to use.”
“As a contractor, I use this daily. The multiple unit conversions are incredibly helpful, and the material estimates give clients instant quotes. Highly recommend!”
“Perfect for my interior design business. I can quickly calculate room sizes and material needs during client consultations. The interface is beautiful too!”