Make a Free Embedded Web Calculator Using JSCalc

If there’s one thing developers hate it’s reinventing the wheel. This is one of the biggest reasons to support the open-source movement and to share your favorite web apps with other developers.

I recently stumbled onto a neat web app called JSCalc that lets anyone create their own embeddable calculator widget from scratch. It runs through JavaScript so you do need to be comfortable with JS code. This web app can save you loads of time building fairly complex calculators from scratch.

JSCalc homepage

The difficult part of any calculator is rarely the math. You can find mathematical solutions for anything from mortgage rates to tax estimations, all from a few Google searches.

The tougher part of building a JS calculator is hooking up all the inputs and handling user data properly. That’s why JSCalc is so useful.

You can build a fully-functioning web form with a few clicks and connect it all to JavaScript functions. The app has three different tabs:

  1. IO – creating the input fields & output data
  2. Script – writing the actual calculations in JavaScript
  3. Share – embed code for your site or a URL for direct linking

When embedding the calculator, you can choose how large to make the form and how it should appear on the site.

Every form created by JSCalc is fully responsive, so you don’t need to worry about mobile users.

And, did I mention this app is totally open-source? You can find the source code on GitHub if you wanna tinker with it or even host your own version.

Definitely a unique web app for developers who want a quick & easy way to create calc forms without coding everything from scratch.

To learn more, check out the main JSCalc site or watch the demo video to see how this thing works in action.