Print Size Converter (mm, pt, px, DPI)
Enter a value, a unit and a DPI (resolution) to convert between mm, cm, inches, pt and px at once. The paper size chart below shows A-series and B-series dimensions in pixels at your chosen DPI. For display sizes, try the Screen Size Calculator; for CSS units, see the CSS Unit Converter.
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Used for px conversion. 300 dpi is typical for print and 72-96 dpi for screens. DPI has no effect on conversions between mm, cm, inches and pt.
Results
Paper size chart
Sizes are shown as short side x long side. Pixel sizes use the DPI set above.
| Size | Size (mm) | Size (px) | Size (pt) |
|---|---|---|---|
| A0 | 841×1189 | ||
| A1 | 594×841 | ||
| A2 | 420×594 | ||
| A3 | 297×420 | ||
| A4 | 210×297 | ||
| A5 | 148×210 | ||
| A6 | 105×148 | ||
| A7 | 74×105 | ||
| A8 | 52×74 | ||
| A9 | 37×52 | ||
| A10 | 26×37 |
| Size | Size (mm) | Size (px) | Size (pt) |
|---|---|---|---|
| B0 | 1030×1456 | ||
| B1 | 728×1030 | ||
| B2 | 515×728 | ||
| B3 | 364×515 | ||
| B4 | 257×364 | ||
| B5 | 182×257 | ||
| B6 | 128×182 | ||
| B7 | 91×128 | ||
| B8 | 64×91 | ||
| B9 | 45×64 | ||
| B10 | 32×45 |
Notes
- Conversions use the fixed ratios 1 inch = 25.4 mm = 72 pt. The pt here is the DTP point (1/72 inch), the same as the CSS pt.
- px is the logical pixel count determined by the DPI. The physical size on screen depends on the real resolution of the display.
- The B series is the Japanese JIS standard (B5 = 182 x 257 mm), which differs from the ISO B series (B5 = 176 x 250 mm).
- Pixel counts are rounded to whole numbers; other units are rounded to 4 decimals (px to 2). Print bleed (usually 3 mm) is not included.
Glossary
DPI
Dots per inch (25.4 mm). At the same paper size, a higher DPI means more pixels and finer print detail.
pt (point)
A typographic length unit equal to 1/72 inch (about 0.3528 mm), commonly used for font sizes.
A and B series
The A series starts from A0 (1 square meter) and halves with each number. The B series starts from B0 (1.5 square meters); Japan commonly uses the JIS B series.
FAQ
How many pixels do I need to print A4 at 300 dpi?
A4 (210 x 297 mm) is about 2480 x 3508 px at 300 dpi. Enter your DPI and the paper size chart lists the pixel size of every A0-A10 and B0-B10 size.
Does DPI affect pt to mm conversion?
No. 1 pt is always 1/72 inch, about 0.3528 mm. DPI only matters when converting to or from px.
Why are the B sizes different from other sites?
This tool uses the Japanese JIS B series. The ISO B series is slightly smaller: B5 is 182 x 257 mm in JIS but 176 x 250 mm in ISO.
Should I use 72 dpi or 96 dpi for screens?
CSS px assume 96 dpi (1 in = 96 px), while DTP points assume 72 dpi. Set the DPI to match your target. Images for print are usually 300 dpi.
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