Square Footage Calculator
Calculate the area of a room, floor, yard or other rectangular space from its length and width.
Use this when multiple spaces have the same length and width.
Area = Length × Width. For feet, the result is square feet. For meters, the result is square meters.
How the Square Footage Calculator Works
For a rectangular space, square footage is calculated by multiplying its length by its width. Both measurements must use the same unit.
For example, a room that is 20 feet long and 15 feet wide has an area of 300 square feet.
How to Use the Square Footage Calculator
Choose a Unit
Select feet, meters or inches based on the measurements you have.
Enter Length and Width
Enter the length and width of the rectangular area using the same unit.
Enter the Number of Spaces
If multiple spaces have identical dimensions, enter the number of spaces to calculate their combined area.
Calculate
The calculator displays the area for one space and the combined total.
Example Square Footage Calculation
Suppose a rectangular room is 20 feet long and 15 feet wide.
- Area = 20 × 15
- Area = 300 square feet
- 300 square feet is approximately 27.87 square meters
- 300 square feet is approximately 33.33 square yards
Square Footage for Multiple Spaces
When several spaces have the same dimensions, multiply the area of one space by the number of spaces. For example, five rooms measuring 10 feet by 12 feet each have a combined area of 600 square feet.
For spaces with different dimensions, calculate each space separately and add the individual areas together.
When Square Footage Is Used
Square footage is commonly used when estimating floor area, flooring requirements, paintable areas, room sizes, property dimensions and material quantities. For irregular spaces, divide the area into simpler rectangles or other shapes and calculate each section separately.
Frequently Asked Questions
How do I calculate square footage?
Multiply the length of a rectangular space by its width, using the same unit for both measurements.
What is the formula for square footage?
Square footage = length in feet × width in feet.
How do I calculate square footage for multiple rooms?
Calculate the area of each room and add the areas together. If all rooms have identical dimensions, you can multiply one room's area by the number of rooms.
Can I calculate area in meters?
Yes. Select meters and enter length and width in meters. The result will be shown in square meters and converted to other common area units.
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