Square Footage Calculator

Multiply the length of the room by its width — both measured in feet. For example, a room that is 15 ft long and 12 ft wide has an area of 180 square feet. If your measurements are in inches, divide each by 12 first to convert to feet before multiplying.

For rectangles and squares, multiply length × width. For circles, use π × radius². For triangles, use 0.5 × base × height. This calculator handles all three shapes — just select the appropriate shape from the dropdown and enter your measurements.

When purchasing flooring, tile, carpet, or sod, you typically need more material than the exact square footage due to cuts, offcuts, overlaps, and mistakes. A 10% waste factor is common for most projects; complex layouts or diagonal patterns may require up to 15–20% extra.

Yes. This calculator automatically converts your result into square yards and square meters. One square yard equals 9 square feet, and one square meter equals approximately 10.764 square feet. These conversions display alongside the primary square footage result.

Enter your price per square foot in the cost field — this is the price of your flooring, paint, sod, or other material per sq ft. The calculator multiplies the total area (including waste factor) by that price to give you an estimated total material cost.

Measure each room individually, then add the results together. If all rooms are the same size, use the Quantity field to multiply a single room's area. For rooms of different sizes, run the calculator separately for each and add the totals.

For irregular outdoor areas, break the space into simple rectangular or circular sections, calculate each separately, then sum the totals. For very large or oddly shaped lots, consider using a mapping tool to trace boundaries, then use the total area result here for cost estimation.

A square foot is a 1 ft × 1 ft area, while a square yard is a 3 ft × 3 ft area — meaning 1 square yard equals 9 square feet. Carpet and some other flooring materials are sometimes priced by the square yard, so the conversion can be important when purchasing materials.