Paper & pixels
Paper-size comparison tool
Compare common ISO and North American paper formats and calculate exact pixel dimensions from their official physical measurements.
◆ Runs locally in your browser
A4210 × 297 mm8.27 × 11.69 in
Pixels required at 300 DPI
2,480 × 3,508 px8.7 megapixels · exact physical dimensionsHOW IT WORKS
A clear answer, with the math to match.
Formula
required pixels = millimetres ÷ 25.4 × PPIA4 at 300 PPI requires 2480 × 3508 pixels in portrait orientation.
COMMON QUESTIONS
Useful context, not filler.
What is the difference between A4 and Letter?＋
A4 measures 210 × 297 mm, while US Letter measures 215.9 × 279.4 mm (8.5 × 11 inches). A4 is narrower and taller.
How many pixels is A4 at 300 DPI?＋
Using the exact ISO physical size, A4 is 2480 × 3508 pixels at 300 PPI in portrait orientation.
Should artwork include bleed?＋
Professional printing often requires bleed beyond the trimmed paper size. Ask your printer for the required bleed before exporting artwork.