How large can these pixels print?
Enter the width and height in pixels. See how many centimetres stay sharp for each use, and whether A4 is safe.
What DPI means
Dots per inch — how many dots fit in one inch (2.54 cm). The same pixels print small and sharp at high DPI, or large and coarse at low DPI. The formula is simple: print size (inches) = pixels ÷ DPI.
Different uses need different DPI
Things held in the hand — cards, flyers — need 300 DPI. Posters are viewed at arm's length, so 150 is plenty; banners from metres away work at 72; billboards are made at 30. The farther away, the lower it can be — which is why one photo can be fine for a banner but not a business card.
Why print shops ask for 300
300 DPI is near the limit of what the eye resolves at 30 cm. Beyond that, files grow with no visible gain. Some presses ask for 350, so check before ordering.
The 'resolution' saved in a photo is not real
The DPI stored in an image file is just metadata; it does not change quality. A 4000 px photo tagged 72 DPI and one tagged 300 DPI are the same photo. Pixel count is what matters.
Tips for common situations
Multi-DPI Print Size Comparison
Enter your image pixel dimensions and DPI to instantly compare maximum print sizes across 300, 150, 72, and 30 DPI benchmarks in both centimeters and inches. An automatic A4 verdict tells you whether your pixel count is sufficient for standard A4 sheet printing at 300 DPI.
A4 Print Readiness Verification
The tool calculates whether your pixel count meets or exceeds roughly 2480 by 3508 pixels needed for clear 300 DPI A4 output. For wall posters viewed from several feet away, lower DPIs such as 150 can still produce acceptable print quality.
Business Card and Sticker DPI Check
Small printed items viewed at close range require 300 DPI to keep fine text and details sharp. Enter your design pixel dimensions to verify whether the resulting physical size in centimeters meets your print shop's required card or sticker dimensions.
Tried with sample values
Screens and numbers from actually running this tool with sample values (2026-10-06, Chromium-based browser on a Mac). Results vary with your input and device.
The default 4032×3024 px image (12.2 MP) was used. At 300 DPI the maximum print size is 34.1 × 25.6 cm, and the page confirms it can print clearly up to A4 (345 DPI).
Size estimates are also given by use case: business cards and flyers at 300 DPI (34.1 × 25.6 cm), A3 posters at 150 DPI (68.3 × 51.2 cm), banners at 72 DPI (142.2 × 106.7 cm), and large signage at 30 DPI (341.4 × 256 cm).
Frequently asked
Can a phone photo print at A4?
A recent phone (12 MP, 4032×3024) fills A4 above 300 DPI — yes. A cropped, zoomed shot has fewer pixels and may not.
Can't I just upscale the pixels?
Upscaling invents no new detail; it only blurs. The only real fix is a larger original.
Can I go from cm to required pixels?
Read the table backwards. A4 (21×29.7 cm) at 300 DPI needs 2480×3508 px. Common sizes are in the preset buttons.
Can I see maximum printable sizes for different formats like banners or posters?
Yes, entering your pixel dimensions generates a reference table for business cards (300 DPI), posters (150 DPI), banners (72 DPI), and billboards (30 DPI).
Does the calculator show print dimensions in both inches and centimeters?
Yes, it calculates and displays the printable dimensions in both centimeters (cm) and inches (in).
How can I tell if my image resolution is high enough for A4 printing?
The tool provides an automated A4 verdict indicating whether the entered pixel dimensions are sufficient for crisp A4 prints.
Do I need to upload my image files to use this calculator?
No, you only enter the width and height pixel values into your browser; no files are uploaded to any server.