Area Calculator Tool
Use this area calculator to measure total surface area quickly in square feet, meters, or yards. Perfect for flooring, painting, landscaping, and construction planning.
📋 On This Page
Area Calculator
📐 Formula Used
Area = Length × Width
Total Area
0 sq ft
Select a shape and enter measurements
Square Feet
0
Square Yards
0
Square Meters
0
Square Inches
0
Area Formulas by Shape
| Shape | Formula | Example (ft) | Result |
|---|---|---|---|
| Rectangle | L × W | 15 × 12 | 180 sq ft |
| Square | Side² | 10² | 100 sq ft |
| Triangle | ½ × B × H | ½ × 10 × 8 | 40 sq ft |
| Circle | π × r² | π × 5² | 78.5 sq ft |
| Trapezoid | ½ × (B1+B2) × H | ½ × (10+14) × 6 | 72 sq ft |
| Ellipse | π × a × b | π × 6 × 4 | 75.4 sq ft |
Area Unit Conversions
| From | To Square Feet | To Square Yards | To Square Meters |
|---|---|---|---|
| 1 Square Foot | 1 sq ft | 0.111 sq yd | 0.0929 sq m |
| 1 Square Yard | 9 sq ft | 1 sq yd | 0.836 sq m |
| 1 Square Meter | 10.764 sq ft | 1.196 sq yd | 1 sq m |
| 1 Acre | 43,560 sq ft | 4,840 sq yd | 4,047 sq m |
Frequently Asked Questions
How do I calculate area?
For a rectangle, multiply length × width. For a circle, use π × radius². For a triangle, use ½ × base × height. For irregular shapes, break them into simple shapes, calculate each, and add the results.
What is the difference between area and perimeter?
Area measures the surface inside a shape (in square feet, sq meters, etc.). Perimeter measures the total length of the boundary around the shape (in feet, meters, etc.). Area is used for materials like flooring and paint; perimeter is used for fencing and trim.
How do I calculate the area of an L-shaped room?
Divide the L-shape into two rectangles. Measure and calculate each rectangle separately, then add the two areas together. This works for any irregular shape — just divide into simpler shapes you can measure.
How many square feet is an acre?
One acre equals 43,560 square feet. A square acre would be approximately 208.7 ft × 208.7 ft. Half an acre is 21,780 sq ft. A quarter acre is 10,890 sq ft.
How do I convert square feet to acres?
Divide square feet by 43,560. For example, 87,120 sq ft ÷ 43,560 = 2 acres. For small lots, divide by 43,560 to get the fraction of an acre.