Paper sizes in pixels at any DPI
A4 is 2480 × 3508 pixels at 300 DPI and 595 × 842 at 72 DPI; US Letter is 2550 × 3300 at 300 DPI. Pixels are the paper size in inches times the DPI.
Choose a paper size and a resolution to see its width and height in pixels.
Enter the width and height of an image to see how large it prints at your resolution.
How to use the calculators
- To set up a document or a canvas, choose the paper size, enter the resolution and choose portrait or landscape. The result is the width and height in pixels.
- To check a photo or a scan, enter its width and height in pixels and the lowest resolution you accept. The result is the largest print of the whole image and the largest paper size of each series that still reaches that resolution.
- For print, use 300 DPI. Use 150 DPI for drafts and posters seen from a distance, and 96 or 72 when a design tool asks for a screen resolution.
Everything is calculated on your device. Without JavaScript the calculators are unavailable; the tables below are complete for the common resolutions.
How the pixel sizes are derived
Resolution is given in dots or pixels per inch. The number of pixels along a side is the side in inches times the resolution, rounded to the nearest whole pixel. ISO sizes are defined in millimetres, so they are divided by 25.4 first: A4 is 210 mm wide, 210 ÷ 25.4 × 300 = 2480.3, which rounds to 2480 pixels.
North American sizes are defined in inches and give whole numbers at most resolutions: Letter is 8.5 × 300 = 2550 by 11 × 300 = 3300 pixels.
The values 96 and 72 come from the web: CSS defines one inch as 96 CSS pixels and as 72 points. A layout of 794 × 1123 CSS pixels is therefore A4 on screen, and 595 × 842 points is A4 in a PDF.
In the other direction, an image printed on a sheet gets as many pixels per inch as its sides allow. The calculator turns the image to match the paper and takes the side with fewer pixels per inch, so the whole image fits without cropping.
A series in pixels
| Size | Paper | 72 dpi | 96 dpi | 150 dpi | 300 dpi |
|---|---|---|---|---|---|
| A0 | 841 × 1189 mm | 2384 × 3370 | 3179 × 4494 | 4967 × 7022 | 9933 × 14043 |
| A1 | 594 × 841 mm | 1684 × 2384 | 2245 × 3179 | 3508 × 4967 | 7016 × 9933 |
| A2 | 420 × 594 mm | 1191 × 1684 | 1587 × 2245 | 2480 × 3508 | 4961 × 7016 |
| A3 | 297 × 420 mm | 842 × 1191 | 1123 × 1587 | 1754 × 2480 | 3508 × 4961 |
| A4 | 210 × 297 mm | 595 × 842 | 794 × 1123 | 1240 × 1754 | 2480 × 3508 |
| A5 | 148 × 210 mm | 420 × 595 | 559 × 794 | 874 × 1240 | 1748 × 2480 |
| A6 | 105 × 148 mm | 298 × 420 | 397 × 559 | 620 × 874 | 1240 × 1748 |
| A7 | 74 × 105 mm | 210 × 298 | 280 × 397 | 437 × 620 | 874 × 1240 |
| A8 | 52 × 74 mm | 147 × 210 | 197 × 280 | 307 × 437 | 614 × 874 |
| A9 | 37 × 52 mm | 105 × 147 | 140 × 197 | 219 × 307 | 437 × 614 |
| A10 | 26 × 37 mm | 74 × 105 | 98 × 140 | 154 × 219 | 307 × 437 |
North American sizes in pixels
| Size | Paper | 72 dpi | 96 dpi | 150 dpi | 300 dpi |
|---|---|---|---|---|---|
| Letter | 8.5 × 11 in | 612 × 792 | 816 × 1056 | 1275 × 1650 | 2550 × 3300 |
| Legal | 8.5 × 14 in | 612 × 1008 | 816 × 1344 | 1275 × 2100 | 2550 × 4200 |
| Tabloid (Ledger) | 11 × 17 in | 792 × 1224 | 1056 × 1632 | 1650 × 2550 | 3300 × 5100 |
| Half Letter (Statement) | 5.5 × 8.5 in | 396 × 612 | 528 × 816 | 825 × 1275 | 1650 × 2550 |
| Executive | 7.25 × 10.5 in | 522 × 756 | 696 × 1008 | 1088 × 1575 | 2175 × 3150 |
| ANSI C | 17 × 22 in | 1224 × 1584 | 1632 × 2112 | 2550 × 3300 | 5100 × 6600 |
| ANSI D | 22 × 34 in | 1584 × 2448 | 2112 × 3264 | 3300 × 5100 | 6600 × 10200 |
| ANSI E | 34 × 44 in | 2448 × 3168 | 3264 × 4224 | 5100 × 6600 | 10200 × 13200 |
| Arch A | 9 × 12 in | 648 × 864 | 864 × 1152 | 1350 × 1800 | 2700 × 3600 |
| Arch B | 12 × 18 in | 864 × 1296 | 1152 × 1728 | 1800 × 2700 | 3600 × 5400 |
| Arch C | 18 × 24 in | 1296 × 1728 | 1728 × 2304 | 2700 × 3600 | 5400 × 7200 |
| Arch D | 24 × 36 in | 1728 × 2592 | 2304 × 3456 | 3600 × 5400 | 7200 × 10800 |
| Arch E | 36 × 48 in | 2592 × 3456 | 3456 × 4608 | 5400 × 7200 | 10800 × 14400 |
B and C series at 300 DPI
The calculator gives the B and C sizes at any resolution; this table lists them at 300 DPI.
| Number | B size (mm) | B at 300 dpi | C size (mm) | C at 300 dpi |
|---|---|---|---|---|
| 0 | 1000 × 1414 | 11811 × 16701 | 917 × 1297 | 10831 × 15319 |
| 1 | 707 × 1000 | 8350 × 11811 | 648 × 917 | 7654 × 10831 |
| 2 | 500 × 707 | 5906 × 8350 | 458 × 648 | 5409 × 7654 |
| 3 | 353 × 500 | 4169 × 5906 | 324 × 458 | 3827 × 5409 |
| 4 | 250 × 353 | 2953 × 4169 | 229 × 324 | 2705 × 3827 |
| 5 | 176 × 250 | 2079 × 2953 | 162 × 229 | 1913 × 2705 |
| 6 | 125 × 176 | 1476 × 2079 | 114 × 162 | 1346 × 1913 |
| 7 | 88 × 125 | 1039 × 1476 | 81 × 114 | 957 × 1346 |
| 8 | 62 × 88 | 732 × 1039 | 57 × 81 | 673 × 957 |
| 9 | 44 × 62 | 520 × 732 | 40 × 57 | 472 × 673 |
| 10 | 31 × 44 | 366 × 520 | 28 × 40 | 331 × 472 |
Worked example: printing a 4000 × 3000 photo
A phone photo is 4000 × 3000 pixels. At 300 DPI the whole image prints at up to 4000 ÷ 300 = 13.3 in by 3000 ÷ 300 = 10 in, which is 33.9 × 25.4 cm.
- A4 is 11.69 × 8.27 in in landscape. The photo gets 4000 ÷ 11.69 = 342 pixels per inch along the long side and 3000 ÷ 8.27 = 363 along the short side, so it prints at 342 DPI.
- A3 is 16.54 × 11.69 in: 4000 ÷ 16.54 = 241.8 DPI, below 300.
- Letter, 11 × 8.5 in, gets 3000 ÷ 8.5 = 353 DPI; Legal, 14 × 8.5 in, only 4000 ÷ 14 = 285.7 DPI.
A4 or Letter is the largest sheet at 300 DPI. A3 at about 240 DPI still looks fine on a wall, where it is seen from further away.
Common mistakes
- Changing the DPI value in an image’s properties and expecting more detail. The number of pixels stays the same; only the print size changes.
- Using a 96 DPI canvas for print. A4 at 96 DPI has 794 pixels across; printed at 300 DPI it is only 6.7 cm wide, or blurred when stretched to A4.
- Mixing up portrait and landscape: 2480 × 3508 and 3508 × 2480 are the same A4.
- Expecting the same pixels as another calculator. Some cut off the fraction instead of rounding, which can make a side one pixel smaller.
- Printing a photo of another shape at full size. A 4:3 photo on A4 either leaves white margins or loses part of its edges.
Sources and checks
The values in the chart are calculated from the definitions in the sources below. They are not copied from another chart. Last checked against the sources on September 29, 2026.
Pixels are the side in inches times the resolution, rounded to the nearest whole pixel. ISO sizes are converted from millimetres at 25.4 mm per inch; North American sizes are defined in inches.
Some tools cut off the fraction instead of rounding, so their values can be one pixel smaller: A4 at 300 dpi is 2480.3 by 3507.9 pixels before rounding.
The millimetre sizes are the same as on the A series, B series and envelope pages of this site and were checked there against ISO 216 and PWG 5101.1.
Used for: Millimetre sizes of the A and B series, from which the pixel values are calculated.
Used for: The C series as geometric mean of the A and B series, rounded down to the millimetre after each halving.
Used for: Inch dimensions of Letter, Legal, Tabloid, Statement, Executive, the engineering sizes ANSI C to E and the architectural sizes Arch A to E, and the ISO C sizes used to check the calculation.
Used for: One CSS inch is 96 CSS pixels and 72 points, which is why screen design tools use 96 and 72 pixels per inch.
Frequently asked questions
- What is A4 size in pixels at 300 DPI?
- A4 is 2480 × 3508 pixels at 300 DPI, from 210 × 297 mm divided by 25.4 and multiplied by 300. That is 8.7 megapixels.
- What is A4 in pixels for screen design?
- At 96 pixels per inch, the CSS reference, A4 is 794 × 1123 pixels. At 72 pixels per inch, the resolution of PDF points, it is 595 × 842.
- What is Letter size in pixels?
- US Letter, 8.5 × 11 in, is 2550 × 3300 pixels at 300 DPI, 1275 × 1650 at 150 DPI, 816 × 1056 at 96 DPI and 612 × 792 at 72 DPI.
- How large can I print an image of 1920 × 1080 pixels?
- At 300 DPI it prints at up to 6.4 × 3.6 in, or 16.3 × 9.1 cm. On A4 it reaches only 130 DPI, which is fine for a poster seen from a distance but soft up close.
- Is DPI the same as PPI?
- For these calculations, yes. PPI counts the pixels of an image per inch; DPI is also used for the dots of a printer, which uses several dots for one pixel. Design tools and print shops usually say DPI for both.
Last updated: September 29, 2026