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.
ScaleSizeDiagonalAreaAspect ratio
1/2.3 inch6.16 × 4.62 mm
Diagonal:7.70 mm
Area:28.46 mm²
4:3
1 inch13.2 × 8.8 mm
Diagonal:15.86 mm
Area:116.16 mm²
3:2
Four Thirds17.3 × 13 mm
Diagonal:21.64 mm
Area:224.90 mm²
4:3
APS-C（Canon）22.3 × 14.9 mm
Diagonal:26.82 mm
Area:332.27 mm²
3:2
APS-C23.5 × 15.7 mm
Diagonal:28.26 mm
Area:368.95 mm²
3:2
Full frame36 × 24 mm
Diagonal:43.27 mm
Area:864.00 mm²
3:2
Medium format 44 × 3344 × 33 mm
Diagonal:55.00 mm
Area:1,452.00 mm²
4:3