A6 in millimetres, centimetres and inches
| Unit | Width × height |
|---|---|
| Millimetres | 105 × 148 mm |
| Centimetres | 10.5 × 14.8 cm |
| Inches, approximately | 4.1339 × 5.8268 in |
| Nominal area | 155.4 cm² |
A6 has half the nominal area of A5. Four pieces fit into A4 in a zero-allowance arrangement: two 105 mm widths make 210 mm, while two 148 mm heights make 296 mm, leaving 1 mm. That is a geometric comparison, before bleed, cutting gaps or printer margins.
What size is A6 in pixels?
Paper dimensions do not determine a single pixel count. Choose the image resolution, divide the millimetres by 25.4 and multiply each side by PPI. The table rounds to the nearest whole pixel.
| Image resolution | Width × height |
|---|---|
| 72 PPI | 298 × 420 px |
| 96 PPI | 397 × 559 px |
| 150 PPI | 620 × 874 px |
| 300 PPI | 1240 × 1748 px |
| 600 PPI | 2480 × 3496 px |
At 300 PPI, nominal A6 is approximately 1240 × 1748 pixels. This calculation uses 105 × 148 mm directly; it does not substitute an idealised quarter of A4 or a rounded photo size. Use the image print-size calculator to check a file you already have.
A6 is not a 4 × 6 inch photo
A 4 × 6 inch photograph measures 101.6 × 152.4 mm. A6 is 3.4 mm wider and 4.4 mm shorter. The two formats can serve similar purposes, but a frame, print order or image prepared for one does not automatically match the other.
| Format | Millimetres | At 300 PPI |
|---|---|---|
| A6 | 105 × 148 mm | 1240 × 1748 px |
| 4 × 6 inch photo | 101.6 × 152.4 mm | 1200 × 1800 px |
Changing between these proportions requires a choice: preserve the complete image and allow borders, or fill the target and crop. Stretching the image independently in each direction changes its proportions. Check the intended trim or frame opening rather than relying on the label “postcard”.
A6 with 3 mm bleed
Adding 3 mm outside every edge makes an artwork footprint of 111 × 154 mm: 105 + 6 by 148 + 6. The finished piece remains A6. Keep important content within the trim and follow the print provider's bleed and safe-area requirements.
The A6-on-A4 worked example constructs two actual-size pieces with 3 mm bleed, 5 mm sheet margins and 3 mm gaps. The A6-on-A3 example constructs five under those allowances. Read the region definitions before changing the inputs.
Use the sheet layout planner for your stock, or download the corresponding PDF and vector worksheets. These are geometric references; confirm physical output with a measured test.
Sources and calculation notes
- Adobe's A-series table provides the 105 × 148 mm nominal size; ISO 216 defines the trimmed A-series standard.
- Adobe's standard photo-size guide identifies the separate 4 × 6 inch print format.
- Adobe's bleed setup guide explains artwork beyond the trim. Our 3 mm allowance is an example, not a universal machine requirement.
Inch, area, pixel and bleed values above are our calculations from the stated dimensions. Displayed conversions are rounded. Manufacturing tolerance, printer scaling and the final cut can affect a physical piece.