Square Footage Calculator
Calculate area in square feet and meters for rectangles, triangles, circles, L-shapes, and trapezoids.
Square Feet120.0sq ft
Square Meters11.15m²
Perimeter44.00 ft (13.41 m)
Area in square feet (and metres) for rectangles and extra shapes on the page. Land in acres is the area converter. Paint and flooring still need extra waste factors.
Formula
Rectangle: A = length × width. Convert other shapes on the page, then sum.
How to calculate
- Measure length and width in the same unit (usually feet).
- Multiply for a rectangle, or use the extra shapes and add them.
- Convert to square metres by dividing sq ft by 10.7639 if needed.
Example
12 ft × 15 ft = 180 sq ft.
Common mistake
Room size ≠ product to buy. Tile and flooring usually add 10% waste. This page is area, not a materials estimator (see concrete, paint, flooring tools).
FAQ
How do I calculate sq ft?
Multiply length by width in feet. This square footage calculator also handles extra shapes.
How many square feet in a square meter?
1 m² ≈ 10.764 sq ft. The area converter is built for unit switching; this page is for measuring rooms.