MagicKit.ai

Crop Factor Calculator

Calculate equivalent focal length between different sensor sizes. Convert full frame to APS-C, Micro Four Thirds, and more.

How to Calculate Crop Factor and Equivalent Focal Length

  1. 1 Enter your actual lens focal length in millimeters
  2. 2 Select the source sensor size (e.g., Full Frame, APS-C)
  3. 3 Select the target sensor size for comparison
  4. 4 View the equivalent focal length and field of view
  5. 5 Check the sensor comparison table for detailed specifications

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Last updated: January 15, 2026 · v2.1