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Camera Crop Factor Calculator — result sheet
Calculate crop factor and equivalent focal length from sensor diagonal and a reference sensor diagonal.
Inputs used
Results
Visual chart
Breakdown
Calculation steps
Returned data table
Formula and methodology
Formula: Crop factor = reference diagonal/sensor diagonal; equivalent focal length = focal length × crop factor.
The diagonal ratio compares framing scale with the selected reference sensor and does not change the lens’s physical focal length.
This result follows the calculator's declared inputs, precision, validation boundaries, and model limits.
Input contract
- Reference sensor diagonal — mm; minimum 1.0E-6; maximum 1000
- Camera sensor diagonal — mm; minimum 1.0E-6; maximum 1000
- Lens focal length — mm; minimum 1.0E-6; maximum 10000
Worked example
| Input | Value |
|---|---|
| Reference sensor diagonal | 43.266 |
| Camera sensor diagonal | 28.2 |
| Lens focal length | 50 |
Crop factor ≈ 1.534; equivalent focal length ≈ 76.7 mm.
Assumptions and limits
- Diagonals and focal length use millimetres.
- The reference and camera sensors are compared by diagonal.
- Aspect ratio, lens distortion, depth of field, and aperture equivalence are not modeled.
Calculator note
Source and methodology
Use the official WorldCalculate methodology policy for the source, formula, precision, and boundary standards behind this calculator.
Planning estimate, not financial, medical, legal, or professional advice. © WorldCalculate — reuse with attribution. Built and curated by Hassan ALRowaie.
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