Measurement

Square Feet Calculator

What you will get

1. Needed

See the estimated project quantity from your measurements.

2. Buy

Add waste and round to complete bags, boxes, cans, bundles or delivery quantities.

3. Check

Review product coverage, site conditions, local requirements and supplier details before ordering.

Quick answer: Calculate square feet, square yards, square meters, and perimeter for one or more rectangular areas. Start with actual measurements, use the product label for coverage or yield, and treat the result as a planning estimate until site conditions and supplier requirements are confirmed.

Convert rectangular dimensions into square feet, square yards, square meters, and perimeter.

Project inputs

Enter length, width, and quantity

Before you order

Re-check the measured dimensions Confirm product yield or package coverage Confirm waste and whole-package rounding Confirm delivery, tax and supplier fees Check local code or professional requirements

Use the result card above to copy, print or share the estimate, then verify the final order with the product label or supplier quote.

How the square feet calculator works

For a rectangle, area is length multiplied by width. If you have several equal areas, multiply that result by the quantity. The calculator also converts the total into square yards and square meters.

area = length × width

Example

A 12 × 10 ft rectangle contains 120 ft², 13.33 yd², and about 11.15 m².

Irregular spaces: divide an L-shaped or irregular room into simple rectangles, calculate each section, then add the areas together.