Paper Sizes Reference
Every paper size in pixels, millimeters, centimeters and inches, at any resolution.
runs entirely in your browser210 × 297 mm
21 × 29.7 cm · 8.27 × 11.69 in
A4 is 210 by 297 millimeters, and 2480 × 3508 pixels at 300 DPI.
A4 in pixels
- 72 DPI → 595 × 842 pxThe old screen standard, still what PDF points assume.
- 96 DPI → 794 × 1123 pxThe CSS reference pixel. Use this one for web layouts.
- 150 DPI → 1240 × 1754 pxDraft printing, and the floor for anything with an image in it.
- 300 DPI → 2480 × 3508 pxThe print standard. What a commercial printer will ask you for.
- 600 DPI → 4961 × 7016 pxLine art and text-only artwork, where edges show.
- Type a resolution to see this size in pixels.
How the sizes compare
A static reference. Nothing to upload, nothing tracked, and every number is worked out in your browser.
Every size, in full
ISO A
The everyday series. Used for documents everywhere except North America.
| Size | Millimeters | Pixels at 300 DPI |
|---|---|---|
| A0 | 841 × 1189 mm | 9933 × 14043 px |
| A1 | 594 × 841 mm | 7016 × 9933 px |
| A2 | 420 × 594 mm | 4961 × 7016 px |
| A3 | 297 × 420 mm | 3508 × 4961 px |
| A4 | 210 × 297 mm | 2480 × 3508 px |
| A5 | 148 × 210 mm | 1748 × 2480 px |
| A6 | 105 × 148 mm | 1240 × 1748 px |
| A7 | 74 × 105 mm | 874 × 1240 px |
| A8 | 52 × 74 mm | 614 × 874 px |
| A9 | 37 × 52 mm | 437 × 614 px |
| A10 | 26 × 37 mm | 307 × 437 px |
US
The North American sizes, defined in inches rather than millimeters.
| Size | Millimeters | Pixels at 300 DPI |
|---|---|---|
| Letter | 215.9 × 279.4 mm | 2550 × 3300 px |
| Legal | 215.9 × 355.6 mm | 2550 × 4200 px |
| Tabloid | 279.4 × 431.8 mm | 3300 × 5100 px |
| Executive | 184.1 × 266.7 mm | 2175 × 3150 px |
| Half Letter | 139.7 × 215.9 mm | 1650 × 2550 px |
| Junior Legal | 127 × 203.2 mm | 1500 × 2400 px |
| Government Letter | 203.2 × 266.7 mm | 2400 × 3150 px |
| Government Legal | 215.9 × 330.2 mm | 2550 × 3900 px |
ISO B
Between two A sizes at each step. Posters, books, and passports.
| Size | Millimeters | Pixels at 300 DPI |
|---|---|---|
| B0 | 1000 × 1414 mm | 11811 × 16701 px |
| B1 | 707 × 1000 mm | 8350 × 11811 px |
| B2 | 500 × 707 mm | 5906 × 8350 px |
| B3 | 353 × 500 mm | 4169 × 5906 px |
| B4 | 250 × 353 mm | 2953 × 4169 px |
| B5 | 176 × 250 mm | 2079 × 2953 px |
| B6 | 125 × 176 mm | 1476 × 2079 px |
| B7 | 88 × 125 mm | 1039 × 1476 px |
| B8 | 62 × 88 mm | 732 × 1039 px |
| B9 | 44 × 62 mm | 520 × 732 px |
| B10 | 31 × 44 mm | 366 × 520 px |
ISO C
Envelopes, sized so the matching A sheet slides in. DL takes an A4 folded in three.
| Size | Millimeters | Pixels at 300 DPI |
|---|---|---|
| C0 | 917 × 1297 mm | 10831 × 15319 px |
| C1 | 648 × 917 mm | 7654 × 10831 px |
| C2 | 458 × 648 mm | 5409 × 7654 px |
| C3 | 324 × 458 mm | 3827 × 5409 px |
| C4 | 229 × 324 mm | 2705 × 3827 px |
| C5 | 162 × 229 mm | 1913 × 2705 px |
| C6 | 114 × 162 mm | 1346 × 1913 px |
| C7 | 81 × 114 mm | 957 × 1346 px |
| C8 | 57 × 81 mm | 673 × 957 px |
| C9 | 40 × 57 mm | 472 × 673 px |
| C10 | 28 × 40 mm | 331 × 472 px |
| DL | 110 × 220 mm | 1299 × 2598 px |
ANSI
The US engineering series, built by doubling Letter.
| Size | Millimeters | Pixels at 300 DPI |
|---|---|---|
| ANSI A | 215.9 × 279.4 mm | 2550 × 3300 px |
| ANSI B | 279.4 × 431.8 mm | 3300 × 5100 px |
| ANSI C | 431.8 × 558.8 mm | 5100 × 6600 px |
| ANSI D | 558.8 × 863.6 mm | 6600 × 10200 px |
| ANSI E | 863.6 × 1117.6 mm | 10200 × 13200 px |
Architectural
US drawing sheets. Wider than the ANSI sizes at the same index.
| Size | Millimeters | Pixels at 300 DPI |
|---|---|---|
| Arch A | 228.6 × 304.8 mm | 2700 × 3600 px |
| Arch B | 304.8 × 457.2 mm | 3600 × 5400 px |
| Arch C | 457.2 × 609.6 mm | 5400 × 7200 px |
| Arch D | 609.6 × 914.4 mm | 7200 × 10800 px |
| Arch E | 914.4 × 1219.2 mm | 10800 × 14400 px |
| Arch E1 | 762 × 1066.8 mm | 9000 × 12600 px |
JIS B
The Japanese B series, larger than the ISO B of the same number. Not interchangeable.
| Size | Millimeters | Pixels at 300 DPI |
|---|---|---|
| JIS B0 | 1030 × 1456 mm | 12165 × 17197 px |
| JIS B1 | 728 × 1030 mm | 8598 × 12165 px |
| JIS B2 | 515 × 728 mm | 6083 × 8598 px |
| JIS B3 | 364 × 515 mm | 4299 × 6083 px |
| JIS B4 | 257 × 364 mm | 3035 × 4299 px |
| JIS B5 | 182 × 257 mm | 2150 × 3035 px |
| JIS B6 | 128 × 182 mm | 1512 × 2150 px |
| JIS B7 | 91 × 128 mm | 1075 × 1512 px |
| JIS B8 | 64 × 91 mm | 756 × 1075 px |
| JIS B9 | 45 × 64 mm | 531 × 756 px |
| JIS B10 | 32 × 45 mm | 378 × 531 px |
RA
Untrimmed printing stock, oversized so the trimmed sheet survives bleed.
| Size | Millimeters | Pixels at 300 DPI |
|---|---|---|
| RA0 | 860 × 1220 mm | 10157 × 14409 px |
| RA1 | 610 × 860 mm | 7205 × 10157 px |
| RA2 | 430 × 610 mm | 5079 × 7205 px |
| RA3 | 305 × 430 mm | 3602 × 5079 px |
| RA4 | 215 × 305 mm | 2539 × 3602 px |
SRA
Supplementary untrimmed stock, with more margin again than RA.
| Size | Millimeters | Pixels at 300 DPI |
|---|---|---|
| SRA0 | 900 × 1280 mm | 10630 × 15118 px |
| SRA1 | 640 × 900 mm | 7559 × 10630 px |
| SRA2 | 450 × 640 mm | 5315 × 7559 px |
| SRA3 | 320 × 450 mm | 3780 × 5315 px |
| SRA4 | 225 × 320 mm | 2657 × 3780 px |
Why A4 in pixels has no single answer
A4 is 210 by 297 millimeters. That is a physical measurement, fixed by ISO 216, and it does not change. A pixel is not a physical measurement at all: it is one sample in a grid, and how many of them fit across 210 millimeters depends entirely on how finely you are sampling. That sampling rate is the DPI, and it is the number every answer to this question is secretly about.
So the honest form of the question is not what is A4 in pixels, it is what is A4 in pixels at a given resolution. At 72 DPI it is 595 by 842. At 96, the resolution a browser assumes for a CSS pixel, it is 794 by 1123. At 150 it is 1240 by 1754. At 300, the one a commercial printer will ask you for, it is 2480 by 3508. Those are four different correct answers to the same question, which is why a page that gives you one number is giving you somebody else's requirement.
The arithmetic is a single step in each direction. Millimeters to inches is a division by 25.4, and inches to pixels is a multiplication by the DPI, so pixels equal millimeters divided by 25.4 times the resolution. Everything on this page is worked out that way from the millimeter figure in the standard, rounded to whole pixels only at the moment it is printed.
Which resolution you actually want
Use 300 DPI for anything going to a commercial printer. It is the number print shops quote, it is what photographic reproduction needs, and it is high enough that the eye stops resolving individual dots at normal reading distance. If someone has asked you for a print-ready A4 file and given you no other detail, they mean 2480 by 3508 pixels.
Use 96 DPI for the web. A CSS pixel is defined against a 96 DPI reference, so an A4 laid out at 96 is the size a browser will treat as A4 when it prints the page. Designers often reach for 72 here out of habit, which is a holdover from early Macintosh displays and from PostScript points, where 72 points make an inch. It is still the right number if you are working in PDF points, and the wrong one if you are working in CSS.
Use 150 DPI when the output is a draft, an internal proof, or a document that will be read on screen and occasionally printed. It cuts the pixel count to a quarter of what 300 DPI produces, and nobody notices on a page of text. Use 600 for line art, technical drawings, and text-only artwork, where the eye follows a hard edge and can see the stair-stepping that 300 leaves behind. Photographs gain nothing at 600, because a photograph has no hard edges to preserve.
Why this page says 4961 where the charts say 4960
At 600 DPI this tool reports A4 as 4961 by 7016 pixels. Almost every chart on the web says 4960 by 7016. The disagreement is one pixel wide and it is worth a paragraph, because the charts got there by a shortcut.
Work it out from the standard. 210 millimeters is 210 divided by 25.4, which is 8.267717 inches, and at 600 samples per inch that is 4960.63 pixels. You cannot have 0.63 of a pixel, so it rounds to 4961. Do the same for the height: 297 millimeters is 11.692913 inches, which at 600 DPI is 7015.75, rounding to 7016. That is where 4961 by 7016 comes from.
Now look at the published pair. 4960 is exactly twice 2480, and 7016 is exactly twice 3508, which are the 300 DPI figures. The charts did not measure A4 at 600 DPI, they doubled their own 300 DPI row. Doubling happens to land on the right answer for the height and one pixel short on the width, because 2480 was itself rounded down from 2480.31 and the error doubles with it. This page prints the arithmetic instead, and says so here rather than quietly matching the more popular number.
In practice the difference will never matter to a print job, since one pixel at 600 DPI is four thousandths of an inch. It matters to whether you can trust the rest of the table, which is the actual reason it is spelled out.
The root-two trick that makes the A series work
Cut a sheet of A4 in half across its long side and you get two sheets of A5, and each one has exactly the same shape as the sheet you started with. No other proportion does this. It works because the ratio of height to width is the square root of two: halving the long side divides it by two, and dividing the long side of a root-two rectangle by two gives you another root-two rectangle, turned ninety degrees.
That single property is why the series exists and why it is convenient in ways people rarely notice. Two A4 pages fit on one A3 with nothing left over, so scaling a document between sizes never introduces a margin or crops an edge. A0 is defined as the root-two rectangle with an area of exactly one square meter, which is why an A4 sheet weighs one sixteenth of whatever the paper's grams-per-square-meter rating says: A4 is A0 halved four times.
Below A0, each A size is the one above it halved and rounded down to the whole millimeter, which is what ISO 216 specifies. That is why A5 is 148 by 210 rather than 148.5 by 210: half of 297 is 148.5, and the standard takes the whole millimeter below it. A0 itself is the exception, because it is not a halving of anything: it is the root-two rectangle of one square meter, 840.896 by 1189.207 millimeters, rounded to the nearest whole millimeter in each direction.
A4 and US Letter are not the same shape
A4 is 210 by 297 millimeters. US Letter is 8.5 by 11 inches, which is 215.9 by 279.4 millimeters. Letter is about 6 millimeters wider and A4 is about 18 millimeters taller, so neither fits inside the other and neither is a scaled version of the other. Letter's ratio is 1.294 against A4's 1.414, which is why a document laid out for one comes out of a printer loaded with the other either clipped at an edge or floating in an uneven margin.
This is the single most common cause of a print job that looks subtly wrong. The fix is to set the page size in the document itself rather than relying on the printer to work it out, and to check the scaling option when a PDF crosses between a European and a North American office. Scale to fit will preserve the whole page at the cost of a slightly smaller image and unequal margins.
The US sizes in the tables below are defined in inches, so their millimeter figures are conversions rather than definitions. The ISO sizes are the reverse: defined in millimeters, with the inch column derived. Every size in the tables below can be read in either unit with the toggle above them, and the conversion runs at full precision, so switching units never changes the size you are looking at.
fair questions
- What is A4 size in pixels at 300 DPI?
- 2480 by 3508 pixels. That comes from A4's physical size of 210 by 297 millimeters: 210 divided by 25.4 is 8.268 inches, and at 300 samples per inch that is 2480 pixels across. 300 DPI is the standard a commercial printer will ask you for, so this is the figure to use for anything going to print.
- What is A4 size in cm?
- 21 by 29.7 centimeters, which is the same thing as 210 by 297 millimeters. In inches it is 8.27 by 11.69. Unlike the pixel dimensions, these do not depend on any resolution setting: they are the size of the physical sheet as ISO 216 defines it.
- Is A4 the same as US Letter?
- No. A4 is 210 by 297 millimeters and Letter is 215.9 by 279.4, so Letter is about 6 millimeters wider and A4 is about 18 millimeters taller. They are not the same shape either, so one cannot be scaled into the other without changing the margins. It is the usual reason a document printed on the other continent comes out clipped or off-center.
- What DPI should I use for printing?
- 300 for anything commercial or photographic, and it is the safe default if nobody told you otherwise. 150 is acceptable for drafts and internal proofs, and carries a quarter of the pixels 300 does. 600 is worth it only for line art and text-only artwork, where hard edges show the stair-stepping that 300 leaves; photographs gain nothing from it. 72 and 96 are screen resolutions and will look soft on paper.
- What paper size is 1920x1080?
- None of them, at any resolution. 1920 by 1080 is a 16:9 shape, and the entire A series is root-two, or about 1.414 to 1, so no amount of changing the DPI will make a widescreen image match a sheet of A paper. At 300 DPI those pixels measure 162.6 by 91.4 millimeters. The search box above will show you the closest standard sizes and exactly how far off each one is on each edge.
- Why does this page say A4 is 4961 pixels wide at 600 DPI when other charts say 4960?
- Because 4960 is the 300 DPI width doubled rather than a measurement. 210 millimeters at 600 samples per inch is 4960.63 pixels, which rounds to 4961. The height works out the same either way, at 7016, which is why the discrepancy shows up on only one of the two numbers. At 600 DPI a single pixel is four thousandths of an inch, so it will not affect a print job.