Print size & DPI calculator
Work out how large and how sharp your design will print. Convert between pixels and centimetres and find the right document size, with bleed, for A-series paper and poster formats.
Free · No sign-up · Runs in your browser
Document
The red line shows the bleed, the black line the trim, the dashed line the safe area.
Is my image good enough to print?
Your files are never uploaded; everything runs in your browser.
How to use
- Pick a preset (A4, A3, 50×70 poster, business card…) or enter your own width and height.
- Set the resolution (DPI) and bleed; printers usually ask for 300 DPI and 3 mm bleed.
- See the document size in pixels, mm, cm and inches.
- Enter your image's pixel size to check whether it is good enough to print.
Highlights
- A0–A6, poster, business card and leaflet sizes.
- Document size including bleed and safe area.
- Effective DPI to judge an image's print quality.
- Instant conversion between pixels, mm, cm and inches.
Frequently asked questions
How many pixels is A4 at 300 DPI?
A4 (210 × 297 mm) is 2480 × 3508 pixels at 300 DPI. With 3 mm bleed on each edge the document becomes 216 × 303 mm, i.e. 2551 × 3579 pixels.
What is bleed?
Bleed is the area of the design that extends beyond the trim line so that no white edges remain after cutting. Printers usually ask for 3 mm on each edge.
What DPI do I need for print?
300 DPI is recommended for work viewed up close, such as leaflets, business cards and magazines. For large posters and billboards viewed from a distance, 150 DPI or less is usually enough.
How do I convert pixels to centimetres?
Use centimetres = pixels ÷ DPI × 2.54. For example, an image 3000 pixels wide prints at 25.4 cm at 300 DPI.
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