Free A Paper Sizes to Pixels Converter
Convert standard ISO A-series paper dimensions (A0–A10) to screen pixels (px) based on PPI / DPI settings
Understanding ISO A Paper Size Conversions
Standardized under the international **ISO 216** guidelines, the A series is the most widely adopted paper format globally. From massive A0 posters to the standard A4 document and tiny pocket labels, every size in this system relies on the mathematical ratio of **1:√2 (1:1.414)**. This allows graphics to scale proportionally without distortion when moving between A-series sizes.
The Mathematical Formula
To map metric paper measurements to pixel dimensions, we divide millimeters by 25.4 to establish physical inches, and multiply the resulting values by the PPI/DPI target:
Width (PX) = (Width mm ÷ 25.4) × DPI
Height (PX) = (Height mm ÷ 25.4) × DPI
For example, to calculate the standard A4 (210 × 297 mm) size in digital pixels under standard screen density of 96 PPI:
Height: (297 mm ÷ 25.4) × 96 PPI = 1,122.5 px (rounded to 1,123px)
To prepare the identical A4 canvas for professional high-quality print templates at 300 DPI:
Height: (297 mm ÷ 25.4) × 300 DPI = 3,507.8 px (rounded to 3,508px)
ISO A Paper Dimensions Reference Table
Compare physical millimeter dimensions and calculated pixels across standard resolution densities:
| ISO Format | Millimeters (mm) | at Web Standard (96 PPI) | at Print Standard (150 DPI) | at High-Res Press (300 DPI) |
|---|---|---|---|---|
| A0 | 841 × 1189 | 3,179 × 4,494 px | 4,967 × 7,022 px | 9,933 × 14,043 px |
| A1 | 594 × 841 | 2,245 × 3,179 px | 3,508 × 4,967 px | 7,016 × 9,933 px |
| A2 | 420 × 594 | 1,587 × 2,245 px | 2,480 × 3,508 px | 4,960 × 7,016 px |
| A3 | 297 × 420 | 1,123 × 1,587 px | 1,754 × 2,480 px | 3,508 × 4,960 px |
| A4 | 210 × 297 | 794 × 1,123 px | 1,240 × 1,754 px | 2,480 × 3,508 px |
| A5 | 148 × 210 | 559 × 794 px | 874 × 1,240 px | 1,748 × 2,480 px |
| A6 | 105 × 148 | 397 × 559 px | 620 × 874 px | 1,240 × 1,748 px |
Designing for Digital Displays vs High-Res Print
When constructing documents or layouts for online viewing, use **96 PPI** to assure physical dimensions translate accurately on digital screens. When configuring magazines, catalogs, leaflets, or posters for publishing presses, configure your targets to **300 DPI** to avoid pixelation.
