Irregular Square Footage Calculator
Sum of rectangles. Enter length×width pairs (one per line).
Result
Total area
266.00 ft²
3 sections summed.
- Section 112×14 = 168.00 ft²
- Section 28×6 = 48.00 ft²
- Section 310×5 = 50.00 ft²
- Total266.00 ft²
Step-by-step
- Sum of 3 rectangles = 266.00 ft².
How to use this calculator
- Decompose your floor plan into rectangles.
- Enter each as "L W" on a separate line.
- Read the sum.
About this calculator
For complex shapes that aren't simple rectangles, decompose into a sum of rectangles. Walk the floor plan, measure each rectangle separately, and sum. The calculator parses any number of L×W pairs.
Frequently asked
Pick the largest rectangle that fits, then add/subtract smaller pieces. Or split along structural lines (interior walls).
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