50mm with APS-C (1.5x)
Focal Length (mm): 50 mm; Crop Factor: 1.5
Equivalent Focal Length (mm): 75 mm
Focal Length Calculator
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Calculates equivalent focal lengths considering sensor size (crop factor) or helps choose lenses.
How To Use
How to use this calculator
Start with your values, or try a preset.
Step 1
Enter Focal Length (mm) and Crop Factor in the units shown.
Step 2
Read Equivalent Focal Length (mm) in the results panel. Results update as you change the inputs.
Step 3
Choose a preset to load an example, then adjust the values for your situation.
Worked Examples
Example calculations
See the inputs and their calculated results.
35mm with APS-C (1.5x)
Focal Length (mm): 35 mm; Crop Factor: 1.5
Equivalent Focal Length (mm): 52.5 mm
50mm with Micro Four Thirds (2x)
Focal Length (mm): 50 mm; Crop Factor: 2
Equivalent Focal Length (mm): 100 mm
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