Paper Size comparison tool
Units
A
A3
297 × 420 mm
US
Letter
216 × 279 mm
Popular comparisons
Scale A3 to fit Letter
66.5%
Reduced to 66.5%, A3 fits inside Letter without cropping. This fills the full height of Letter and leaves 18 mm of blank space across the width.
- Scale to match width
- 72.7%
- Scale to match height
- 66.5%
- Area of Letter vs A3
- 48.4%
What is the difference between A3 and Letter?
The primary difference between A3 and Letter is that A3 is taller and wider (297 × 420 mm) compared to Letter (216 × 279 mm).
In terms of surface area, A3 is 106.8% larger than Letter.
An A3 piece of paper measures 297 × 420 mm or 11.7 × 16.5 inches. Cutting it in half will create two A4 sheets of paper. A3 is part of the A series.
A Letter piece of paper measures 216 × 279 mm or 8.5 × 11 inches. Letter is part of the US series.