Optional.
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Most rooms are rectangles or combinations of rectangles. Break the space into pieces, measure each, and add them together. A bay or angled wall can be handled as a triangle (base × height ÷ 2).
Measuring tips
- Measure at floor level, wall to wall, and round up to the next inch or centimetre.
- For an L-shaped room, split it into two rectangles that do not overlap.
- 1 m² = 10.764 ft².
Once you know the area, take it to the flooring, tile or paint calculators.
Watch: how it is done
Video by The Organic Chemistry Tutor on YouTube. More in our video library.
Frequently asked questions
How do I find the square footage of an L-shaped room?
Divide it into two rectangles, multiply length by width for each, and add the results.
How do I convert square feet to square metres?
Divide square feet by 10.764. To go the other way, multiply square metres by 10.764.
Results are planning estimates. For structural work, confirm requirements with your local building authority and a qualified professional. See our disclaimer.