Focal Length Converter
35mm equivalent, crop factor, and field of view calculator for any camera.
About Focal Length Converter
Focal Length Converter turns the focal length printed on your lens into a real, comparable number — instantly.
Pick your sensor (Full Frame, APS-C Canon, APS-C Nikon/Sony/Fuji, Micro Four Thirds, 1 inch, Medium Format) and the app gives you the 35mm equivalent, the crop factor, and the exact horizontal, vertical, and diagonal angle of view — with a clean visual diagram of the cone of view.
Built for photographers, filmmakers, and anyone shopping for a new camera or lens.
KEY FEATURES
• 35mm equivalent for 6 sensor classes
• Crop factor shown next to every result
• Horizontal / vertical / diagonal field of view in degrees
• Live angle-of-view diagram
• Automatic lens classification: super wide, wide, wide standard, standard, portrait, telephoto, super telephoto
• Camera comparison mode — match the same field of view across two bodies (e.g. 50mm full frame ≈ 31mm APS-C)
• 37 languages
• Works 100% offline
• Light & dark theme
WHO IT'S FOR
• Photo enthusiasts comparing kit lenses across systems
• Filmmakers planning shots with crop sensors
• Photo students learning angle of view
• Camera buyers checking what 24mm really looks like on APS-C
No login. No tracking. No data leaves your phone.
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