Irregular Area Calculator
Break an odd-shaped room or lot into rectangles and right triangles, enter each piece, and add them into one total in square feet and square meters.
Rooms and lots rarely come as a single clean rectangle, but almost any flat shape can be carved into rectangles and right triangles. That is the trick this calculator uses: you split the space into simple pieces, measure each one, and it adds the areas into a single total. A rectangle's area is length times width; a right triangle's area is half its base times its height. Sum the pieces and you have the whole.
Add a row for each piece, choose rectangle or triangle, and type its two dimensions. An L-shaped room becomes two rectangles; a lot with a clipped corner becomes a rectangle plus a triangle. The running total updates as you go, in square feet with the square-meter equivalent beside it. For example, a `12 ft` by `10 ft` rectangle plus a right triangle with a `6 ft` base and `4 ft` height totals `120 + 12 = 132` square feet. Switch the toggle to enter everything in meters. Measure carefully where pieces meet so you neither double-count nor leave a gap.
Right triangle base 6 ft, height 4 ft = 12 sq ft
Total = 132 sq ft (12.26 sq m)