ISO A · ISO 216
A1 paper size
A1 measures 594 × 841 mm (23.39 × 33.11 inches). At 300 PPI, the portrait canvas is approximately 7016 × 9933 pixels, without bleed.
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A1 dimensions in every unit
In portrait orientation, width comes first: 594 mm × 841 mm. Rotate the sheet for landscape orientation and the same measurements reverse.
| Unit | Width | Height |
|---|---|---|
| Millimeters | 594 mm | 841 mm |
| Centimeters | 59.4 cm | 84.1 cm |
| Inches | 23.39 in | 33.11 in |
| Points | 1683.8 pt | 2383.9 pt |
Digital artwork
A1 size in pixels at 72, 96, 150, 300 and 600 PPI
There is no single pixel size for A1. The table uses image resolution in pixels per inch (PPI), often called DPI in paper-size searches. Printer DPI describes ink dots, not image pixels. Values are rounded to the nearest whole pixel and exclude bleed.
| Resolution | Pixel width | Pixel height | Typical use |
|---|---|---|---|
| 72 PPI | 1,684 px | 2,384 px | Screen preview |
| 96 PPI | 2,245 px | 3,179 px | Screen preview |
| 150 PPI | 3,508 px | 4,967 px | Draft print |
| 300 PPI | 7,016 px | 9,933 px | Quality print |
| 600 PPI | 14,031 px | 19,866 px | High-detail source |
Landscape, custom resolution and bleed
For landscape at 300 PPI, use 9933 × 7016 px. For any other resolution, calculate each side as millimeters ÷ 25.4 × PPI, then round once at the end. Use the millimeter values above rather than rounded inches.
If your printer asks for 3 mm bleed on every edge, add 6 mm to both dimensions: 600 × 847 mm, or approximately 7087 × 10004 px at 300 PPI. This is an example, not a universal bleed requirement.
Changing a low-resolution image’s PPI label alone does not add detail. A 72 or 96 PPI value also does not guarantee life-size display on a screen. Adobe explains image resolution and resampling.
Proportion & comparison
How A1 relates to nearby sizes
A1 is half the area of A0 and twice the area of A2. Fold A1 in half parallel to the short edge and the result is A2.
A0 dimensions · A2 dimensions · A4 dimensions · Printable A0–A6 size chart
- Portrait ratio
- 1 : 1.4158
- Area
- 0.4996 m²
- Orientation
- 594 × 841 mm
Works well for
Common A1 uses
- Posters
- Academic displays
- Architectural plans
- Retail presentation boards
Check before using
Where it can go wrong
- Desktop printers
- Mailing without folding or a tube
- Raster graphics prepared only for screens
Regional & printer note
Will a printer recognize A1?
Widely recognized by print shops and plotters in ISO-size markets; uncommon in ordinary desktop printer trays.
Always match the document size, print-driver size, paper tray, and physical sheet. A driver can silently scale a page even when the preview looks correct.
Measurement source
Checked against the defining standard
Paper Size Lab converts the stored millimeter measurements mathematically; it does not round-trip between units. The underlying sheet family is referenced to the standards organization below.
Read ISO 216:2007Questions people ask
A1 paper FAQ
What are the dimensions of A1 paper?
A1 measures 594 × 841 millimeters, 59.4 × 84.1 centimeters, or 23.39 × 33.11 inches in portrait orientation.
How many pixels is A1 at 300 DPI?
A1 is 7016 × 9933 pixels at 300 DPI before adding bleed.
Is A1 the same as another paper size?
A1 is half the area of A0 and twice the area of A2. Fold A1 in half parallel to the short edge and the result is A2.
What is A1 commonly used for?
A1 is commonly used for posters, academic displays, architectural plans, retail presentation boards. Printer, postal, and finishing requirements still vary.
What is A1 in pixels in landscape orientation?
At 300 PPI, landscape A1 is approximately 9933 × 7016 pixels. At another resolution, swap the width and height from the pixel table. The physical sheet size does not change.
Why do A1 pixel dimensions vary between websites?
Pixel counts depend on the chosen pixels per inch (PPI). This page calculates each side as millimeters ÷ 25.4 × PPI, then rounds to the nearest whole pixel. Rounding up instead can produce a one-pixel difference. Bleed also increases the canvas dimensions.