Plugin utilizes WordPress Shortcodes, so all you need to do is to insert this shortcode:
[calculoid id="64" show_title="1" show_description="1"]
With the id parameter you specify which calculator you want to display. You can use this shortcode anywhere in WordPress. If show_title is set to1, it will load calculator’s title. If show_title is set to 0 (zero), calculator’s title will not be loaded. show_description is the same. If set to 1, it will load description of the calculator, if set to 0, it will not load description.
Plugin’s configuration allows you to insert your API key, which you receive when you register to Calculoid.com. So if you want to embrace all features of your Calculoid membership, insert your API key.
The calculator does not use iframe, so it is part of your HTML content, which is great, because it inherits your CSS styles and the calculator fit in. The same font, same color and so on.
It won’t slow down your website. The calculator is loaded asynchronously after the website is loaded.