# @turf/area ## area Takes one or more features and returns their area in square meters. **Parameters** - `geojson` **[GeoJSON][1]** input GeoJSON feature(s) **Examples** ```javascript var polygon = turf.polygon([[[125, -15], [113, -22], [154, -27], [144, -15], [125, -15]]]); var area = turf.area(polygon); //addToMap var addToMap = [polygon] polygon.properties.area = area ``` Returns **[number][2]** area in square meters [1]: https://tools.ietf.org/html/rfc7946#section-3 [2]: https://developer.mozilla.org/docs/Web/JavaScript/Reference/Global_Objects/Number --- This module is part of the [Turfjs project](http://turfjs.org/), an open source module collection dedicated to geographic algorithms. It is maintained in the [Turfjs/turf](https://github.com/Turfjs/turf) repository, where you can create PRs and issues. ### Installation Install this module individually: ```sh $ npm install @turf/area ``` Or install the Turf module that includes it as a function: ```sh $ npm install @turf/turf ```