Calculate area in square feet for any shape — rooms, yards, properties.
| Shape | Formula | Example |
|---|---|---|
| Rectangle | length × width | 12×12 = 144 sq ft |
| Square | side² | 10² = 100 sq ft |
| Circle | π × radius² | r=5 → 78.5 sq ft |
| Triangle | 0.5 × base × height | 10×8 → 40 sq ft |
| Trapezoid | (top+bottom)/2 × height | (6+10)/2×8 = 64 sq ft |
Tip: For irregular rooms, divide into rectangles and calculate each separately. Measure wall-to-wall, not baseboard-to-baseboard.