Size guide
How large is a camera sensor?
From 1/2.3-inch to medium format, compare true width, height, area, and proportions behind each name.
1/N inch is not the actual diagonal
The name comes from early video camera tube formats. The real diagonal is often about two-thirds of the nominal value, so it cannot be converted directly.
Millimeter dimensions are more reliable
Width times height gives area; the square root of width squared plus height squared gives diagonal. Every rectangle uses the same calculation.
Common sensor comparison
Rectangles are shown at the same scale.
| Size | Diagonal | Area | Aspect ratio |
|---|---|---|---|
| 1/2.3 inch | 7.7 mm | 28.46 mm² | 4:3 |
| 1 inch | 15.86 mm | 116.16 mm² | 3:2 |
| Four Thirds | 21.64 mm | 224.9 mm² | 4:3 |
| APS-C (Canon) | 26.82 mm | 332.27 mm² | 3:2 |
| APS-C | 28.26 mm | 368.95 mm² | 3:2 |
| Full frame | 43.27 mm | 864 mm² | 3:2 |
| Medium format 44 × 33 | 55 mm | 1,452 mm² | 4:3 |