What is Area Calculator?
The KML Area Calculator is a specialized GIS utility designed to measure the size of geographic shapes contained within KML (Keyhole Markup Language) files. Unlike simple map rulers, this tool processes complex files containing hundreds of polygons at once.
It uses geodesic calculations (WGS84 ellipsoid) to ensure accuracy over large distances, accounting for the curvature of the Earth. This makes it suitable for real estate, agriculture, and environmental planning.
When Should You Use This Tool?
- •You have a KML file from Google Earth and need to know the total acreage.
- •You need to find the center point (centroid) of multiple land parcels.
- •You want to convert polygon measurements into a spreadsheet (CSV) for a report.
- •You need to verify land survey data quickly without installing QGIS or ArcGIS.
How to Use Area Calculator
- Upload your KML/KMZ or GeoJSON file.
- The tool automatically analyzes the geometry.
- View results in the table below the map.
- Switch units (e.g., Acres to Hectares) using the dropdown.
- Download the report as CSV or copy to clipboard.
Real-World Use Cases
Agriculture & Farming
Farmers use this to measure field sizes in hectares or acres to calculate seed and fertilizer requirements accurately.
Real Estate & Land Development
Developers use it to aggregate the total area of multiple parcels and quickly feasibility studies.
Environmental & Emergency Services
Planners use it to measure affected areas (e.g., flood zones or fire perimeters) to estimate impact.
Supported Formats & Limits
- Input Formats: .kml, .kmz, .json, .geojson
- Max File Size: 50MB (Soft limit for browser performance)
- Geometry Types: Polygons and MultiPolygons (for Area), LineStrings (for Length). Points are ignored for area.
- Privacy: All processing is done client-side in your browser using JavaScript. No files are uploaded to our servers.