Help calculating fields within layouts?

Hi all-

I’m very very new to OpenEMR and without any kind of background in it - but very willing to learn!
I have been making a layout for our clinicians to use when administering drugs and they would like the layout to automatically calculate certain values based on fields they input (weight, concentration etc).
I do not have the slightest idea how to accomplish this. Can someone point me in the right direction?

If you are not a PHP developer, calculated fields is not an option in layouts.

If you are a developer, you may find it easier to create your own custom form rather than a layout - options.inc.php is the calculator behind layouts.