Square Footage Calculator

For a rectangular area, multiply the length by the width in feet: area = length × width. A room 12 feet by 10 feet is 120 square feet. If your measurements are in inches, yards, or meters, this calculator converts them to feet automatically before multiplying.

Convert each measurement to feet first, then multiply. There are 12 inches, 1/3 of a yard, and about 3.281 feet in a meter. This calculator handles the conversion for you — just pick your unit from the dropdown and enter the length and width in that unit.

Calculate each rectangular section separately and add them together. For repeated identical areas, use the quantity field to multiply one area by the number of sections. For an irregular shape, split it into rectangles, find each area, and sum them.

Multiply the total square footage by the price per square foot. For flooring at $4.50 per square foot over 120 square feet, the cost is 120 × 4.50 = $540. Enter a price per square foot in this calculator to see the total cost, and consider adding 5–10% for waste and cuts.

Linear feet measure length in a single direction, while square feet measure two-dimensional area (length × width). Flooring and land are sold by square foot; trim, fencing, and lumber are often sold by linear foot. They are not interchangeable.