Square Footage Calculator

How to Calculate Square Footage

Square footage is just an area measured in feet, and it’s often abbreviated sq ft or ft2. One square foot is equal to a square area with a length and width of 1 foot, or 12 inches.

Square footage is commonly used for construction, home remodeling, and renovation projects such as carpeting, hardwood flooring, tiling, drywalling, painting, and gardening material estimates.

You can calculate the square footage of a space using the area formula, which states that the area of a space is equal to its length times its width. This is the formula for a rectangle, but we’ll cover the area formulas for different shapes below.

Steps to Calculate Square Feet

• Measure the length and width of the area.
• Convert these measurements to feet if they aren’t already. Convert inches, yards, or meters to feet using a converter if needed.
• Multiply the length in feet times the width in feet (length × width). Use one of the formulas below to calculate square footage for various non-rectangular shapes.
• To estimate the cost of materials to cover the area, multiply the total square footage by the price per square foot.
• If the area is not a simple shape, break it into manageable parts and calculate the area of each part separately and then add them together. For example, to measure a floor of your home, calculate the square feet of each room, then add all area measurements together to derive the total square footage.

Square Footage Formulas

Use the formulas below to find the area in square feet for various shapes. Convert all measurements to feet before using the formulas.

Rectangle

Rectangular Border

Circle

Triangle

How to Find the Square Footage of a Room

You can use the formulas above to find the square footage of any room in your home. Measure the dimensions of the room using a tape measure, then apply them to the applicable formula.

For instance, if the room is rectangular, measure the length and width in feet. Then, multiply them together to find the area in square feet.

For oddly shaped rooms, split the room into smaller, easily measurable sections, and calculate the area of each section separately. Add the area of each section together to find the total square footage of the room.

How to Calculate Price per Sq Ft

To calculate the price per square foot of your home, divide the total price of the home by the total number of square feet.

How to Convert to Square Feet

You can also calculate square feet by converting a known area that’s in different units of measure. You can convert square inches, square yards, or square meters to square feet using one of the formulas below.

Square Inches:

Square Yards:

Square Meters: