Crop Factor Equivalent Calculator
Crop factor calculators help photographers understand how a lens mounted on a crop-sensor camera behaves compared to the same lens on a full-frame (35mm) body. Smaller sensors use only the central portion of the lens image circle, producing a narrower field of view. Multiplying the actual focal length by the crop factor gives the full-frame equivalent field of view. Similarly, multiplying the actual aperture by the crop factor gives the full-frame equivalent depth of field. Enter your lens focal length, aperture, and sensor crop factor below.
Crop factor formula
Equivalent focal length (mm) = actual focal length x crop factor
Equivalent aperture = actual aperture x crop factor
Example: 50 mm f/1.8 lens on a 1.5x APS-C sensor. Equivalent focal = 50 x 1.5 = 75 mm. Equivalent aperture = 1.8 x 1.5 = f/2.7. This means the lens frames like a 75 mm lens and has depth-of-field character similar to f/2.7 on full frame.
Common sensor crop factors
- Full-frame (35mm film / Canon 5D, Nikon Z6, Sony A7): 1.0x
- APS-H (Canon 1D series, discontinued): 1.3x
- APS-C Nikon F/Z, Sony E, Fuji X: 1.5x
- APS-C Canon EF-S / RF-S: 1.6x
- Micro Four Thirds (Olympus/Panasonic): 2.0x
- 1-inch (Sony RX100, Nikon 1): 2.7x
Crop factor calculator: frequently asked questions
What is a crop factor?
A crop factor is the ratio of the diagonal of a full-frame 35mm sensor (43.27 mm) to the diagonal of a smaller sensor. An APS-C Canon sensor has a crop factor of about 1.6; Nikon/Sony APS-C is about 1.5; Micro Four Thirds is 2.0.
How does crop factor affect field of view?
Equivalent focal length = actual focal length x crop factor. A 50 mm lens on a 1.5x crop sensor gives the same field of view as a 75 mm lens on full frame. The actual focal length and optics do not change; only the portion of the image circle that the sensor captures changes.
Does crop factor affect depth of field?
Yes. To achieve the same field of view and depth of field on a crop sensor as on full frame, you need a wider aperture. Equivalent aperture = actual aperture x crop factor. An f/2.8 lens on an APS-C 1.5x crop sensor gives depth of field equivalent to f/4.2 on full frame.
What are common crop factors for popular sensor sizes?
Full frame (35mm): 1.0x. APS-H (Canon 1D series): 1.3x. APS-C (Canon): 1.6x. APS-C (Nikon, Sony, Fuji): 1.5x. Micro Four Thirds: 2.0x. 1-inch sensor: 2.7x. 1/2.3-inch (compact/phone): approximately 5.6x to 6x.
Does crop factor affect exposure?
No. Exposure (in terms of the light hitting each pixel) is determined by aperture and shutter speed alone, not by sensor size. Crop factor affects field of view and depth of field equivalency, not the raw EV reaching the sensor for a given f-stop and shutter speed.
Official sources
- ISO 12232:2019: Photography, Digital still cameras. ISO.org.
- CIPA DC-004: Guidelines for the Image Sensor Size Notation. Camera and Imaging Products Association. CIPA.jp.
Reviewed by the CalculatorHub team, edited by James Graham, 15 June 2026. See our methodology.