PaperSize
Calculate pixels

ISO A-series reference

A3 paper size in pixels, mm and inches

A3 is exactly 297 × 420 mm. Set a whole PPI to prepare an image for portrait or landscape output.

Frontend-only exact arithmetic

Paper and resolution

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Orientation
Resolution settings: 300 PPI
Enter a whole PPI from 1 to 2400.
Common PPI

Calculated sheet

A3 · 300 PPI

mm
297 × 420
cm
29.7 × 42
in
11.6929 × 16.5354
Nearest whole pixels
3508 × 4961 px

Exact pixel dimensions

445500/127 × 630000/127 px

Decimal display: 3507.874 × 4960.6299 px pixels = tenthsMm × PPI / 254

Scale comparison with A4

The silhouettes share one physical scale. They are a visual comparison, not a print preview.