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Focal Length Converter

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35mm equivalent, crop factor, and field of view calculator for any camera.

Downloads
58+
on Google Play
Price
Free
No in-app purchases
Updated
Sep 18
2026 · v1.0.4
Get it onGoogle Play See alternatives

Screenshots

  • Focal Length Converter screenshot 1
  • Focal Length Converter screenshot 2
  • Focal Length Converter screenshot 3
  • Focal Length Converter screenshot 4
  • Focal Length Converter screenshot 5

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.

What’s new

Version 1.0.4 · Updated September 18, 2026

• Minor stability improvements

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