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Crop Factor Calculator
Crop factor compares a sensor diagonal against full frame, and it applies to focal length and aperture but not to exposure. That is why a 50 mm f/2 lens on a micro four thirds body frames like a 100 mm f/4 on full frame while still admitting the same light per unit area.
How it works
Sensor size
Lens focal length
Aperture
Subject distance
Full-frame equivalent focal length
Equivalent aperture for depth of field
Crop factor
Diagonal angle of view
Field of view width
Sensor diagonal
Frequently asked questions
How do I use the Crop Factor Calculator?
Fill in the fields above โ the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.