Square mm of defined area, help very much appreciated

Dear ImageJ Community,
If possible i kindly ask for help. I would like to measure with imageJ the shown are in Square mm as i have a lenght scale in mm as seen in the picture attached. If you could please tell me how to do this.

Thank you in advance,

Hi @Nadal,

Welcome to the forum (and congrats for your last grand Slam :slight_smile: )

The best thing to do is to calibrate your images (Images>Properties). Doing this, all you measurements (including area) will be calibrated and her, you result will be expressed as mm².

All this is explained here : Spatial Calibration of an image


Ps : of course, all this can be automated in a script if you have lots of images

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