How do I measure an L-shaped room?

Split it into two rectangles, calculate each area separately using this calculator, then add the two results together for the total square footage.

Square Footage Calculator

Calculate the square footage of a room, lot, or project area for rectangles, squares, circles, and triangles.

Shape

Length (ft)

Width (ft)

Area

120.00 sq ft

Square meters11.15 m²

What Your Result Means

The area result tells you how much surface space your shape covers, in both square feet and square meters - useful for flooring, paint, sod, tile, or any project priced by area.

How It Is Calculated

Rectangle: Length × Width
Square: Side × Side
Circle: π × Radius²
Triangle: 0.5 × Base × Height

Worked Example

A 12 ft × 10 ft rectangular room has an area of 120 square feet, or about 11.15 square meters.

Important Assumptions

All dimensions should use the same unit (feet).
For irregular rooms, break the space into simple shapes and add the areas together.

Frequently Asked Questions

How do I measure an L-shaped room?: Split it into two rectangles, calculate each area separately using this calculator, then add the two results together for the total square footage.

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Methodology

This calculator uses standard geometric area formulas. See our methodology page for details.

This calculator provides estimates for general informational purposes only and should not be relied upon as the sole basis for any decision.