Fast, free calculators and tools for everyday problems.
Calculate area from length and width for rooms, flooring, and planning projects.
A quick overview to help you understand what this tool does and how to use it well.
Use this square footage calculator to find the area of a room, wall, floor, or other rectangular space. This tool is useful for estimating flooring, paint, tile, carpet, and other material needs during planning, renovation, or home improvement projects.
By entering the length and width of a space, you can quickly calculate its total square footage without doing the math manually.
Fields marked with * are required.
Your result updates after a successful calculation.
Total square footage
180 sq ft
Area of the rectangular surface or room.
Area summary
A 12 foot by 15 foot area covers 180 square feet.
Readable square footage summary for the entered dimensions.
See the formula, calculation method, and reasoning behind the result.
This calculator finds the area of a rectangular space using a simple formula:
Area = length × width
The result is expressed in square units, such as square feet, when the measurements are entered in feet.
This type of calculation is commonly used for:
Square footage is one of the most common ways to estimate the size of a space, and even a simple room measurement can be useful when planning materials, pricing, or layout decisions.
Find the square footage of a room that is 12 feet long and 15 feet wide. This example shows how square footage is calculated by multiplying length by width. The result can then be used to estimate materials such as flooring, paint coverage, or carpet for the space.
Example results
Common questions about this tool.
This version is for simple rectangular spaces.
Yes. Decimal measurements help when working with real rooms and materials.
To calculate square footage, multiply the length of the space by its width. For example, a room that is 12 feet by 15 feet has an area of 180 square feet.
Square footage is commonly used for estimating flooring, tile, carpet, paint coverage, and other renovation or home improvement materials. It is also useful for understanding the size of a room or area.
Yes, this calculator is useful for basic flooring estimates because it helps you determine the area of the floor surface.
Yes, if you measure a wall’s height and width, this calculator can be used to estimate wall area. That can help with paint, wallpaper, or paneling calculations.
If the space is not rectangular, you can break it into smaller rectangles, calculate each section separately, and then add the totals together.
Square footage helps you estimate how much material you need, compare costs, and avoid overbuying or underbuying supplies for a project.