Area Calculator
Compute areas for common 2D shapes with unit options
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Area Calculator
The following are calculators to evaluate the area of seven common shapes. Modify the values and click the "Calculate" button to use.
Quick Navigation
🟥Rectangle Area
Formula
area = length × width
Result
🔺Triangle Area
Formula
area = √(s(s − a)(s − b)(s − c)), where s = (a + b + c) / 2
Result
🔶Trapezoid Area
Formula
area = ((b1 + b2) / 2) × h
Result
⚪️Circle Area
Formula
area = π × r²
Result
🧩Sector Area
Formula
area = (θ / 360°) × πr² if θ is in degrees, or area = (θ / 2π) × πr² if θ is in radians
Result
🥚Ellipse Area
Formula
area = πab
Result
💠Parallelogram Area
Formula
area = b × h
Result
Area
Area is a quantity that describes the size or extent of a two-dimensional figure or shape in a plane. It is the two-dimensional counterpart of the one-dimensional length of a curve, and the three-dimensional volume of a solid. The SI unit is the square meter (m²).
Common Area Units
| Unit | Area in m² |
|---|---|
| square meter | SI Unit |
| hectare | 10,000 |
| square kilometre (km²) | 1,000,000 |
| square foot | 0.0929 |
| square yard | 0.8361 |
| acre | 4,046.9 (43,560 square feet) |
| square mile | 2,589,988 (640 acres) |
Related: Volume Calculator