Measure the space, size the order.
Enter your dimensions and get the area in square feet, square yards, square meters and acres, plus exactly how much flooring to buy once you add a waste allowance and what it will cost.
The area
For odd rooms, measure each section, calculate it here, and add the results. Buy about 10% extra flooring to cover cuts and mistakes.
What these numbers tell you
The order at a glance
Area in every unit, and cost by price
The same area shown in each common unit, plus what the material costs at a few price-per-square-foot levels after your waste allowance.
| Measure | Value |
|---|
| Price per sq ft | Material (with waste) | Total cost |
|---|
Square footage, explained
How to Calculate Square Footage
For rectangles, multiply length by width. For circles, use pi times radius squared. For triangles, multiply base times height and divide by 2. All measurements should be in feet to get the result in square feet.
Converting Square Feet to Square Meters
One square foot equals approximately 0.0929 square meters. Multiply your square footage by 0.0929 to convert. This is useful for international projects or when working with metric specifications.
Common Square Footage Applications
Square footage calculations are essential for flooring, painting, roofing, landscaping, and real estate listings. Accurate measurements save money by preventing over-ordering materials and help in comparing property sizes.
Measuring Irregular Spaces
For irregular rooms, break the space into rectangles, triangles, and circles. Calculate each section separately and add the results. For L-shaped rooms, divide into two rectangles. For curved areas, approximate with a circle or series of triangles.
Common questions
How do I measure a room that is not a perfect rectangle?
Break the room into smaller rectangles, measure each one separately, and add the areas together. For example, an L-shaped room can be divided into two rectangles whose combined area gives the total square footage.
How do I calculate the square footage of a circle?
Select Circle as the shape and enter the radius (half the diameter) as the length. The calculator uses the formula pi times radius squared (3.14159 x r x r) to compute the area.
What is the difference between square footage and linear footage?
Linear footage measures length in one dimension (a line), while square footage measures area in two dimensions (length times width). A 10-foot linear measurement is a line; a 10-square-foot area could be 2 ft by 5 ft.
How many square feet are in an acre?
One acre contains 43,560 square feet. To convert square feet to acres, divide by 43,560. A typical residential lot ranges from 5,000 to 15,000 square feet (about 0.11 to 0.34 acres).
Estimates for planning only. Round up when you order, keep a few spare pieces for future repairs, and confirm quantities with your supplier before you buy.