Convert Focal Length to 35mm Equivalent

This site maps a 35mm-equivalent lens' focal length to a camera with a different sensor size. Select one of the pre-defined choices below or enter your own camera sensor size in mm.


Enter your own sensor size in mm:

Look Up Your Sensor Size

Don't know your camera sensor size? Look it up in the Camera Sensor Size Database.

About This Site

This site is a micro-site created using the Django Python Web Framework. The entire site is coded with a handful of code within a single html page.

Camera sensor sizes and crop factors are from Wikipedia's Image Sensor Format page.

View more micro-sites at