Crop Factor Calculator — Sensor Crop & Focal Length Equivalent
Calculate the crop factor for your camera sensor and find the full-frame equivalent focal length for any lens. Supports APS-C, Micro Four Thirds, 1-inch, and custom sensor sizes.
✓ Free · ✓ No upload · ✓ Works offline in your browser
Results
Crop Factor
1.00×
Full-Frame Equivalent
50mm
50mm × 1.00 crop
Horizontal FOV
39.6°
Vertical FOV
27.0°
Crop Factor Reference Table
| Sensor Type | Dimensions | Crop Factor | Cameras |
|---|---|---|---|
| Full Frame | 36×24mm | 1.0× | Canon R5, Nikon Z6 III, Sony A7 IV |
| APS-H | 27.9×18.6mm | 1.3× | Canon 1D series (older) |
| APS-C (Nikon/Sony) | 23.6×15.7mm | 1.5× | Nikon Z50, Sony A6700, Fuji X-T5 |
| APS-C (Canon) | 22.4×14.8mm | 1.6× | Canon R10, Canon R50 |
| Micro Four Thirds | 17.3×13mm | 2.0× | Olympus OM-5, Panasonic G9 II |
| 1-inch | 13.2×8.8mm | 2.7× | Sony RX100, Nikon Z30 (DL series) |
| 1/2.3-inch | 6.17×4.55mm | 5.6× | Most smartphones, GoPro |
Frequently Asked Questions
What is crop factor?
Crop factor is the ratio of a 35mm full-frame sensor's diagonal to your sensor's diagonal. A Canon APS-C sensor (22.4×14.8mm) has a crop factor of ~1.6× because it's 1.6× smaller than full frame. This means a 50mm lens on APS-C behaves like an 80mm lens on full frame.
How do I calculate crop factor?
Crop factor = diagonal of full-frame sensor (43.3mm) ÷ diagonal of your sensor. Calculate your sensor diagonal using the Pythagorean theorem: √(width² + height²). For APS-C Nikon (23.6×15.7mm): diagonal = √(23.6² + 15.7²) = 28.4mm. Crop = 43.3 ÷ 28.4 = 1.52×.
What is the crop factor for APS-C?
APS-C crop factor is 1.5× for Nikon, Sony, Fujifilm, and Pentax (23.6×15.7mm sensor). Canon APS-C is 1.6× (22.4×14.8mm). These small differences matter when calculating exact focal length equivalents.
What is the crop factor for Micro Four Thirds?
Micro Four Thirds (used by Olympus and Panasonic) has a 2× crop factor. The sensor measures 17.3×13mm. A 25mm MFT lens gives the same field of view as a 50mm lens on full frame.
Does crop factor affect depth of field?
Yes. To get the same field of view AND same depth of field on APS-C (1.5×) as full frame, you need to open the aperture by 1.5× stops. A full-frame 50mm at f/2 is equivalent in DOF to an APS-C 33mm at f/1.3 (which may not exist). This is why full-frame cameras are preferred for shallow depth of field.
Does crop factor affect image quality?
Crop factor itself doesn't directly degrade quality. However, smaller sensors typically have smaller photosites, which collect less light — reducing dynamic range and high-ISO performance. Full-frame sensors generally outperform APS-C in low light because of larger total sensor area, not just the crop factor alone.