How to Move a Calculator From PHP to WordPress

1. Log in to your WordPress administrator area. Click 'Plugins,' then click 'Add New.' Type 'PHP execution' into the search box, then click 'Search Plugins.'
2. Locate 'PHP execution' in the search results, then click 'Install Now' underneath its title. Wait a few moments for the plug-in to install, then click 'Activate Plugin' when the process is complete. This plug-in does not need to be configured, and PHP written into posts or pages can be read properly.

3. Copy the PHP code for your calculator onto the clipboard. Return to the WordPress screen, then place the cursor at the point on the post or page that you want the calculator to go. Right-click and click 'Paste.' You may need to start a new line to put some space between the calculator and any surrounding text or images.
4. Visit the post or page to see if the calculator is displaying correctly. If you see an error message where the calculator should go, check that the plug-in has been activated. If the calculator does not display at all, return to the editing screen of the post or page that it is on. Clear your browser cache, then click the 'Update' button on the top-right of the screen.