Paper size converter

Dimensions for every common paper size — ISO A and B series, North American, and photo formats — in millimeters, centimeters, inches, and pixels at the DPI you choose.

Paper size

DPI (for pixels)

ISO 216 A series

ISO A paper sizes in millimeters and inches
Size	mm	inches	px @ 300 DPI	Note
A0	841 × 1189	33.11 × 46.81	9933 × 14043	One square meter of paper
A1	594 × 841	23.39 × 33.11	7016 × 9933
A2	420 × 594	16.54 × 23.39	4961 × 7016
A3	297 × 420	11.69 × 16.54	3508 × 4961
A4	210 × 297	8.27 × 11.69	2480 × 3508	Standard office paper in most of the world
A5	148 × 210	5.83 × 8.27	1748 × 2480
A6	105 × 148	4.13 × 5.83	1240 × 1748	Common postcard size
A7	74 × 105	2.91 × 4.13	874 × 1240
A8	52 × 74	2.05 × 2.91	614 × 874
A9	37 × 52	1.46 × 2.05	437 × 614
A10	26 × 37	1.02 × 1.46	307 × 437

ISO 216 B series

ISO B paper sizes in millimeters and inches
Size	mm	inches	px @ 300 DPI	Note
B0	1000 × 1414	39.37 × 55.67	11811 × 16701
B1	707 × 1000	27.83 × 39.37	8350 × 11811
B2	500 × 707	19.69 × 27.83	5906 × 8350
B3	353 × 500	13.90 × 19.69	4169 × 5906
B4	250 × 353	9.84 × 13.90	2953 × 4169
B5	176 × 250	6.93 × 9.84	2079 × 2953	Common book and notebook size
B6	125 × 176	4.92 × 6.93	1476 × 2079
B7	88 × 125	3.46 × 4.92	1039 × 1476
B8	62 × 88	2.44 × 3.46	732 × 1039
B9	44 × 62	1.73 × 2.44	520 × 732
B10	31 × 44	1.22 × 1.73	366 × 520

North American sizes

North American paper sizes in millimeters and inches
Size	mm	inches	px @ 300 DPI	Note
Letter	215.9 × 279.4	8.50 × 11.00	2550 × 3300	8.5 × 11 in — US/Canada office standard
Legal	215.9 × 355.6	8.50 × 14.00	2550 × 4200	8.5 × 14 in
Tabloid	279.4 × 431.8	11.00 × 17.00	3300 × 5100	11 × 17 in (Ledger in landscape)
Executive	184.1 × 266.7	7.25 × 10.50	2175 × 3150	7.25 × 10.5 in
Half Letter	139.7 × 215.9	5.50 × 8.50	1650 × 2550	5.5 × 8.5 in

Photo print sizes

Photo paper sizes in millimeters and inches
Size	mm	inches	px @ 300 DPI	Note
4 × 6 photo	101.6 × 152.4	4.00 × 6.00	1200 × 1800
5 × 7 photo	127 × 177.8	5.00 × 7.00	1500 × 2100
8 × 10 photo	203.2 × 254	8.00 × 10.00	2400 × 3000
Wallet photo	63.5 × 88.9	2.50 × 3.50	750 × 1050	2.5 × 3.5 in

Frequently asked questions

What size is A4 in inches and pixels?

A4 is 210 × 297 mm, which is about 8.27 × 11.69 inches. At 300 DPI (print quality) that is 2480 × 3508 pixels; at 72 DPI (legacy screen resolution) it is 595 × 842 pixels.

What is the difference between A4 and US Letter?

A4 (210 × 297 mm) is slightly narrower and taller than US Letter (215.9 × 279.4 mm, i.e. 8.5 × 11 in). Documents formatted for one often clip or reflow on the other, which is why printer drivers offer scale-to-fit.

Why do A sizes halve so neatly?

ISO 216 sizes use a 1:√2 aspect ratio, the only ratio that stays the same when you halve the sheet. Cutting A4 in half across the long side yields two A5 sheets with identical proportions, and A0 is defined to have an area of one square meter.

How do I convert a paper size to pixels?

Multiply each dimension in inches by the DPI (dots per inch). For A4 at 300 DPI: 8.27 in × 300 ≈ 2480 px wide and 11.69 in × 300 ≈ 3508 px tall. Higher DPI means more pixels for the same physical size.