How do I measure an L-shaped room?
Measure the full outer rectangle and the rectangular corner that is missing, then subtract the missing area. Alternatively, split the L into two non-overlapping rectangles and add them together.
Calculators
Square Footage Calculator
Measure rooms and plan DIY flooring projects with feet, inches and metric units
- Community votes0
- DR by Ahrefs14 no change since last check
Ahrefs Domain Rating set in type 8 Nov 2026, reset 8 Nov 2026.
A free browser tool for calculating room areas in multiple units, handling L-shaped rooms and multiple spaces, with guides for flooring, painting and tile
The story so far
Square Footage Calculator is a free browser-based tool that helps people measure room areas and plan DIY projects. It accepts measurements in feet and inches, decimal feet, inches, meters, or centimeters, and converts them to square feet.
The tool handles rectangular, L-shaped, circular and triangular rooms, and allows users to add up to 20 rooms together while accounting for closets, alcoves and cutouts. It includes measurement guides and explains the difference between decimal notation (12.6 feet) and mixed units (12 feet 6 inches).
Beyond measurement, the calculator helps plan flooring purchases by accounting for waste allowances and rounding to whole boxes. It provides guidance on calculating wall area for painting, and tile area for installation. All calculations stay in the browser; no account is needed and measurements are not stored after the page closes.
Typeset features
- Calculate area in feet, inches, decimal feet, meters and centimeters
- Support for rectangular, L-shaped, circular and triangular rooms
- Add up to 20 rooms together
- Automatic unit conversion between feet, inches and metric
- Flooring calculator for waste allowance and whole-box rounding
- Handles closets, alcoves and cutouts
- View formulas and assumptions
- No account required
- Fractional inches support
Pricing
Pricing model: Free
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Square Footage Calculator metrics
| Metric | Value |
|---|---|
| Domain Rating | 14 no change since last check |
| Trust Flow | 7 no change since last check |
| Citation Flow | 16 no change since last check |
| Referring domains | 23 no change since last check |
| External backlinks | 75 no change since last check |
Ahrefs Domain Rating set in type 8 Nov 2026, reset 8 Nov 2026. Lead topic: Business (6). Majestic set 8 Nov 2026, reset 8 Nov 2026. Link data typeset by Majestic. Trust Flow, Citation Flow and Topical Trust Flow are trademarks of Majestic-12 Ltd.
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Questions and answers
Is 12 feet 6 inches the same as 12.6 feet?
No. Six inches is half a foot, so 12 ft 6 in equals 12.5 ft. A decimal such as 12.6 ft means 12 feet plus 0.6 of a foot, which is 7.2 inches.
Can I add more than one room?
Yes. You can add up to 20 rooms, give each an optional name, choose its shape and enter its dimensions. The total includes all rooms.
Do I add waste when measuring?
Measure net area first. Add a separate waste allowance in the flooring calculator, as waste varies with product, layout and installation method.
Is the square footage calculator free?
Yes. It is free, requires no account, and keeps your measurements in the current browser tab until you reset or leave.
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Square Footage Calculator has a free listing. The owner can unlock the full profile with a paid launch for $5:
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