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Area Measurement

Square Footage Calculator

Calculate the total square footage of a room or property made up of multiple rectangular sections — perfect for L-shaped rooms, additions, or irregular floor plans.

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Room Sections

Result


Enter section dimensions to calculate total area
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Disclaimer: This calculator sums rectangular sections for planning purposes. For official real estate or legal square footage documentation, use a licensed appraiser or surveyor’s measurement.

About the Square Footage Calculator

Many real rooms and properties aren’t simple rectangles. This calculator lets you break an irregular space into up to three rectangular sections, calculates each section’s area, and sums them for the total square footage.

Measuring an L-Shaped Room

Split an L-shaped room into two rectangles at the corner where the shape changes direction. Measure each rectangle’s length and width separately, enter both as Section 1 and Section 2, and the calculator adds them together.

Cost Estimation

Enter an optional cost per square foot (for flooring, painting, or construction materials) to get an instant total project cost estimate alongside your area calculation.

Frequently Asked Questions

Divide the space into rectangular sections at each point where the shape changes direction. Measure the length and width of each rectangle separately, then enter them as Section 1, Section 2, etc. — the calculator sums them into a total.
Square footage measures area in feet (length × width in feet). Square yardage divides that by 9 (since 1 square yard = 9 square feet) — commonly used for carpet and some flooring materials sold by the yard.
Yes — enter your room dimensions to get total square footage, then check your specific paint or flooring product's coverage rate (e.g. sq ft per gallon or per box) to determine how much material to buy.
You can include them as additional sections if you want the full room area, or exclude them by measuring only the main floor space — it depends on whether your use case (e.g. flooring vs. real estate listing) requires those areas included.
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