Image DPI Checker & Print Size Calculator
Check photo dimensions, inspect embedded resolution when available, and calculate the print size at your chosen pixels-per-inch (PPI) target.
Free · No login · Browser-based processing · No file uploads to ZM
Image DPI Checker & Print Size Calculator
Select an image to check its resolution and print dimensions.
About this tool
An image marked “300 DPI” is not automatically print-ready. For example, a 1200 × 1800 px photo can print at approximately 4 × 6 inches at 300 PPI, irrespective of whether the original file embeds a DPI label.
For JPEG, the tool checks common JFIF and EXIF resolution fields; for PNG, it checks pHYs pixel-density data. Missing or conflicting metadata is possible. Calculated print sizes should be treated as guidance, not a guarantee of professional printing quality.
Frequently asked questions
Does changing DPI improve image quality?
No. Changing a DPI label does not add pixels or detail. Printed sharpness depends on pixel dimensions, source quality, viewing distance and printer.
What if my image has no DPI metadata?
That is normal. You can still calculate physical print size from the pixel dimensions and the PPI you choose.
What is the difference between DPI and PPI?
PPI describes image pixels per inch at a physical size. DPI technically describes printer dot density. Image files often use DPI informally to mean PPI.
Does this tool check WebP DPI metadata?
It reports pixel dimensions for WebP but does not attempt to interpret every possible embedded WebP metadata variant.
Are my photos uploaded?
No. Your browser reads the file locally; the image is not sent to the ZM server.