Understand print resolution
Start here if DPI, PPI, 150 DPI, and 300 DPI are the confusing part.
Choose a print DPI →Practical print-resolution guides that connect physical sizes, pixel dimensions, and the YesDPI tools used to check or prepare a real image.
Pick the outcome first, then use the detailed reference and matching calculator together.
Start here if DPI, PPI, 150 DPI, and 300 DPI are the confusing part.
Choose a print DPI →Match common photo dimensions with the pixels and aspect ratio your image needs.
Open photo print sizes →Compare standard poster sizes at realistic print densities and calculate custom requirements.
Open poster sizes →Get portrait and landscape A4 pixel dimensions at 72–600 DPI.
Open A4 pixel guide →YesDPI guides are grouped around real print decisions: checking an existing file, choosing a physical size, and preparing enough pixels for the final output.
Two units that get confused constantly — and why it matters for print.
Find an image's current DPI and pixel dimensions in seconds, right in your browser.
Device-by-device steps for finding an image's DPI and resolution, plus a reliable browser-based alternative.
Choose a practical DPI for photos, documents, posters, canvas, banners, and screen-only images.
What editing a DPI value actually does — and why it isn't the same as adding detail.
Calculate A4 pixel dimensions at any DPI and compare portrait and landscape values.
The exact pixel dimensions an 8×10 photo needs at 300 DPI and other common resolutions.
Compare standard and A-series poster dimensions at 100, 150, 200, and 300 DPI with a live calculator.
Pixel dimensions, aspect ratios, and crop guidance for common photo print sizes from 4×6 to 16×20.