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Full-Frame to APS-C
Lens Focal Length Calculator

Enter your full-frame lens focal length in millimeters and the crop factor (default is 1.6 for Canon APS-C; most other cameras are 1.5; MFT, Micro Four Thirds is 2.0). This tool calculates the effective focal length when used on an APS-C camera.

Full-Frame Focal Length (mm):

Crop Factor (1.6 for Canon, 1.5 for most others, 2.0 for MFT Micro Four Thirds):

Calculate APS-C Equivalent

APS-C Equivalent Focal Length (mm):

Note: Results are approximate. Actual equivalence may vary slightly based on sensor dimensions and lens design.

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