Script to find the area of shapes in Adobe Illustrator

GetShapeArea.jsx

/* Save this file with a jsx extension and place in your
Illustrator/Presets/en_US/Scripts folder. You can then 
access it from the File > Scripts menu */

/*
Script grabbed from
https://gist.github.com/bryanbuchanan/11387501
fixes negative areas "bug" (some areas are shown negative)
and shows result in square milimeters, given that's
the default unit used in document.
*/
/* Forked by krekr to convert to mm and cm (metric) for my love 2017/10/27 :) */

if (app.documents.length > 0) {

	if (app.activeDocument.selection.length < 1) {
		alert('Select a path first');
	} else if (app.activeDocument.selection[0].area) {
		// Individual Items
		var objects =  app.activeDocument.selection;
	} else if (app.activeDocument.selection[0].pathItems) {
		// Group/Compound Shape
		var objects = app.activeDocument.selection[0].pathItems;
	} else { 
		alert('Please select a path or group.');
	}
	
	// Collect info
	var totalArea = 0;
	for (var i=0; i<objects.length; i++) {
		if (objects[i].area) {
			var totalArea = totalArea + objects[i].area;
		}
	}
    
	// Conversions    
	var ppi = 72;
	var areaInInches = Math.round((totalArea / ppi / ppi) * 100) / 100;
	if (areaInInches < 0) var areaInInches = -areaInInches;
	
	var areaInMm = Math.round(areaInInches * (25.4 * 25.4));
	var areaInCm = Math.round(areaInInches * (2.54 * 2.54));
	
	// Display
	//alert('Shape Area\n' + areaInInches + ' square inches \n' + i + ' shapes');
	//alert('Shape Area\n' + areaInMm + ' square mm \n' + i + ' shapes');
	alert('Shape Area\n' + areaInCm + ' square cm \n' + i + ' shapes');

}