A crop sensor sees a tighter slice of the scene than a full frame sensor, so a lens behaves like a longer one when mounted on it. This calculator converts any focal length into its full frame equivalent using the crop factor of your camera, which is how photographers compare framing across different systems. Enter a focal length and choose your sensor, or type a custom crop factor, and you get the equivalent focal length plus the effective aperture, since the crop factor also affects depth of field. A 50mm lens on an APS-C body with a 1.5x factor frames like a 75mm lens on full frame. Understanding this helps you pick the right lens for a portrait, a landscape, or wildlife on any camera. Everything is computed locally in your browser with nothing sent to a server.
A crop sensor sees a tighter slice of the scene than a full frame sensor, so a lens behaves like a longer one when mounted on it. This calculator converts any focal length into its full frame equivalent using the crop factor of your camera, which is how photographers compare framing across different systems.
Yes. Crop Factor Calculator is completely free, with no sign-up and no usage limits.
Yes. Crop Factor Calculator runs in any modern web browser. There is nothing to download or install.
Yes. Crop Factor Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.