Your files stay on your device

Crop factor calculator

Converts focal length and aperture to full-frame equivalents for a chosen sensor and compares two camera setups with angles of view.

Enter a sensor size and a focal length to see the equivalents.

The arithmetic is all here: crop = 43.2666 / sqrt(width² + height²), full frame diagonal in millimetres; equivalent focal = real focal × crop; equivalent f-number = f × crop, which holds both for depth of field and for total light; angle of view = 2 × atan(side / (2 × focal)). Aperture equivalence assumes the same subject and print size; it says nothing about noise, resolution, or stabilisation, and the light-stops figure is an area ratio, not a measurement of any lens. Computed in this tab, nothing uploaded.
Options

More unit & math tools

- Aspect ratio and DPI (/converters/aspect-ratio)
- Unit converter (/converters/units)
- Fraction calculator (/converters/fractions)
All unit & math tools (/converters)

Was this tool useful?
YesNo

Canonical HTML: https://nutter.tools/converters/crop-factor-calculator
Markdown version: https://nutter.tools/converters/crop-factor-calculator.md
Plain-text version: https://nutter.tools/converters/crop-factor-calculator.txt
Agent index: https://nutter.tools/llms.txt