About image dpi checker
DPI (dots per inch) describes how densely an image is meant to print. A file with the same pixels can print large and coarse or small and sharp depending on that number.
Pixels, DPI and print size
Print width in inches equals pixels divided by DPI. A picture 3000 pixels wide printed at 300 DPI is 10 inches wide. The same picture at 100 DPI would be 30 inches wide, but each inch would hold fewer dots and look coarse.
Handy guidelines
- 300 DPI is the usual target for sharp photo prints and documents.
- 150 DPI is acceptable for large prints seen from a distance.
- 72 or 96 DPI is only a screen convention. It does not change how a picture looks on a monitor.
A caution
Some images carry no DPI value at all. Changing the DPI tag does not add detail, only the pixel count does.
