Compare A3 Dimensions
Compare A3 size (A Paper Sizes) side-by-side with other international formats and reference objects.
Paper Sizing Converters
A3
297 mm × 420 mm
297 mm
Letter
216 mm × 279 mm
216 mm
Credit Card
86 mm
Aspect Ratio
1 : 1.41 (√2)
Primary format (A3). Comparison aspect ratio is 1 : 1.29.
Digital Output Pixels
3508 px × 4961 px
300 DPI