Area Calculator
Draw polygons on the map to calculate area and perimeter.
Online Area Calculator
Rodosto Area Calculator lets you instantly calculate land area and perimeter by drawing polygons on a map. It uses geodesic formulas to provide highly accurate results.
Features
- Polygon Drawing: Draw freeform polygons or rectangles on the map to calculate area.
- Multiple Units: Results are displayed in m², km², hectares, donum, and acres.
- Perimeter Calculation: View the perimeter of the drawn shape in meters or kilometers.
- Manual Input: Enter coordinates manually to create polygons.
- Editing: Drag and edit drawn shapes, and results update in real time.
How to Use
Select the polygon or rectangle tool from the drawing tools on the left and click on the map to define your shape. Area and perimeter are calculated automatically. Alternatively, you can enter coordinates manually.
Other Tools
To measure distance between points, use the Distance Calculator. To visualize your map data, try the Map Viewer.
Frequently Asked Questions
How accurate is the online area calculator?
The tool uses geodesic (Haversine) formulas for high-precision results — accurate to within square meters for small areas, and less than 0.1% error for large areas. For legal or cadastral measurements, professional field surveys are required.
What is the difference between hectares and acres?
1 hectare = 10,000 m² = 2.471 acres. Hectares are the standard international unit for land area, while acres are commonly used in the US and UK. The tool displays results in both units simultaneously.
Is my data secure?
Yes, all calculations happen entirely in your browser (client-side). Your coordinates or map data are never sent to any server. This tool is completely free to use.
Need a More Comprehensive Solution?
For large-scale land analysis, GIS integration, or custom mapping application development, contact Rodosto Technology.