Square Footage Calculator

Measurement

Square Footage Calculator

Calculate square footage and square meters for rectangles, circles and triangles.

Area Details

Total Area
120 ft²
Rectangle · 1 area
Square Meters11.15 m²
Square Yards13.33 yd²
Square Inches17,280 in²
Acres0.0028 ac
For L-shaped spaces, split the project into rectangles, calculate each section and add the results.

How to Calculate Square Footage

Square footage measures the area of a surface. The correct formula depends on the shape you are measuring.

Rectangle or Square

Area = Length × Width

Circle

Area = π × Radius²

Triangle

Area = Base × Height ÷ 2

Irregular spaces: Divide the space into simple rectangles, circles or triangles, calculate each section separately, then add the results.

Square Feet to Square Meters

One square meter equals approximately 10.7639 square feet. The calculator automatically shows square feet, square meters, square yards and acres.

Example

A room that measures 12 feet by 10 feet has an area of:

12 × 10 = 120 ft²

That is approximately 11.15 square meters.

Common Uses for Square Footage

Square footage is used when estimating flooring, tile, paintable wall areas, roofing, landscaping, insulation and many other building materials.

Frequently Asked Questions

How do I calculate wall square footage?

Multiply the wall width by the wall height. Calculate each wall separately and add the results.

Should I subtract doors and windows?

For many material estimates, subtracting large openings improves accuracy. Small openings are sometimes left in the estimate to provide a natural allowance.

How do I calculate an L-shaped room?

Split the room into two rectangles, calculate each rectangle and add the areas together.

Planning estimate: Measure each area carefully and use the exact material coverage information when converting square footage into products.

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