Square Footage Calculator
Find the area of a room, floor or any rectangle — in square feet, square meters and acres — with feet+inches or metric input, plus optional material cost.
Enter the dimensions
Area
Square feet × 0.092903 = square meters. 43,560 sq ft = 1 acre.
Frequently asked questions
How do I calculate square footage?
Multiply the length by the width of the room or surface. For a 12-foot by 10-foot room that is 120 square feet. The calculator does this with feet+inches or metric input.
How do I convert feet and inches?
Add the inches as a fraction of a foot — divide inches by 12 and add to the foot value. For example, 10 ft 6 in = 10.5 feet. The calculator handles this automatically.
How many square feet in an acre?
There are 43,560 square feet in one acre. Divide the total square footage by 43,560 to get acres.
How do I measure an L-shaped or irregular room?
Split the space into rectangles, calculate each one separately, then add the results together.
How do I convert square feet to square meters?
Multiply square feet by 0.092903 to get square meters, or divide square meters by 10.764 to get square feet.