InstaCalc is a different kind of calculator, it is a fast, simple and powerful calculator. It can be embedded into any web page with a snippet of HTML which is very impressive. It is easier to type calculations in almost real language than using Excel. InstaCalc allow you see multiple calculations and results at once, accept readable equations, save and share the link, display charts.At first, the interface is a little complicated, once you figure it out, you will have a lot of fun using it.