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Square Footage Calculator
Calculate the area of a room, floor, yard, or other rectangular space using its length and width. Add multiple areas to calculate the total square footage.
How to Use the Square Footage Calculator
Enter the length and width of each area you want to calculate. Select the appropriate unit for your measurements, and the calculator will determine the area in square feet and square meters.
If your project contains multiple rooms or areas, use the + Add another area button to calculate each space separately and get one combined total.
How to Calculate Square Footage
For a rectangular area, square footage is calculated by multiplying the length by the width when both measurements are in feet.
Square Footage = Length × Width
For example, a room that is 20 feet long and 10 feet wide has an area of:
20 × 10 = 200 square feet
Calculating Multiple Rooms
For a home, flooring project, or other space with several rooms, calculate the square footage of each room separately and then add the results together.
For example:
- Living room: 20 × 15 = 300 ft²
- Bedroom: 12 × 10 = 120 ft²
- Kitchen: 10 × 12 = 120 ft²
The total area is 540 square feet.
Square Feet vs. Square Meters
Square feet and square meters are both units used to measure area. The square foot is commonly used in the United States, while the square meter is the standard metric unit for area.
One square meter is approximately 10.764 square feet.
The calculator automatically converts your result between square feet and square meters.
Square Footage Calculator Example
Suppose you want to calculate the area of a rectangular room that is 15 feet long and 12 feet wide.
Using the formula:
15 × 12 = 180 square feet
The room has an area of 180 ft², which is approximately 16.72 m².
Frequently Asked Questions
How do I calculate square footage?
For a rectangular area, multiply the length by the width. If both measurements are in feet, the result is the area in square feet.
How many square feet is a 10 × 10 room?
A 10-foot by 10-foot room has an area of 100 square feet because 10 × 10 = 100.
Can I calculate multiple rooms?
Yes. Add another area for each room or space. The calculator calculates each area separately and provides a combined total.
How do I calculate square footage from inches?
You can enter measurements in inches and the calculator will convert them to feet before calculating the area.
How do I convert square feet to square meters?
Multiply square feet by approximately 0.092903 to convert the result to square meters.