Magnification: image ÷ actual size

Enter the image size and the actual size to see the magnification, with unit conversions between mm and µm.

Learn magnification properly

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Questions students ask

How do you convert mm to µm?

Multiply by 1000: 1 mm = 1000 µm. Always put image and actual size in the same units before dividing.

What formula does it use?

Magnification = image size ÷ actual size.

Free notes on magnification

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