How to measure area of all footprints in design

How would one go about measuring the total are of all components in a design? This is to decide the board size before placement. Usually a conservative 60% is preferred

I hereby certify that I am not simply asking someone else to design a footprint for me.

This is an auto-generated message that is in place on the “footprints” section of the KiCad.info forum. If I remove it and ask for a footprint to be designed anyway, I understand that I will be subject to forum members telling me to go design my own footprint or referring me to a 3rd party footprint site.

Hmmm… Sum up the court yards? I’m not sure why you need to know the board size before placement unless you have an unusually shaped board? On a ‘normal’ rectangular board changing the board size on the edge cut layers is easy enough.

When you 1st import a circuit into the PCB tool, all components are grouped together so you could draw a crude rectangle around them and do an x*y (or as hermit says, sum the courtyard)