Free Calculators for Your Website

If you want to embed one of these calculators on your page, copy the HTML code and paste it in the appropriate section of your website's code, or insert it into your blog's JavaScript/HTML widget or plugin. No coding knowledge is needed on your part, Had2Know.org does the math for you!

Also check out our huge index of 400+ calculators (not embeddable, but free to use while you are on Had2Know.org).