added jQuery.calcNaturalWH / jQuery.fn.calcNaturalWH() to jQuery.loadImg. This utilily function waits img loading and returns naturalWidth, naturalHeight. Also do polyfill things for non-naturalWidth/Height supported browsers. $.calcNaturalWH('img1.jpg').done(function(wh){ alert(wh.width); // 1200 alert(wh.height); // 1000 }) $('img#anImgElementOnThePage').calcNaturalWH().done(function(wh){ alert(