Hi B-W-Design,

re: Is it possible to calculate the m² of an plane area?

Sorry, currently there is not anything set up in MoI by default to give area or volume measurements. That is something that I plan to work on adding in the future though.

For the time being you would need to export your plane to a different CAD program and measure the area there.

You can also try the script Brian mentions above, that's available here:
http://moi3d.com/forum/index.php?webtag=MOI&msg=5549.12

- Michael