Hi
If you looking bitcoin (or any altcoin) profit mining calculator for your site, you can buy it.
Now i completed develop bitcoin mining calc, and other coin in progress.
This calc use PHP, JS (jQuery), AJAX.
I can help integrate this calc with your site, or you do it self. I send source code.
I can customize, and add more Feature.
This calculator available online, you can see it on your browser.
Screenshot:
https://i.imgur.com/I0JaHNB.jpghttp://imgur.com/a/JAzZ1If interesting it, please, send me private massage.