Print DPI Calculator
Enter your image's pixel dimensions and the print size to calculate the effective DPI (dots per inch).
Last updated: September 5, 2026
Frequently asked questions
What DPI do I need for a good quality print?
300 DPI is the standard target for close-up viewing (like photo prints and documents). For larger prints viewed from a distance (posters, banners), 150 DPI or even lower can look sharp, since the viewing distance is greater.
How do I calculate the DPI for a specific print size?
Divide your image's pixel width by the intended print width in inches, and do the same for height - a 3000×2000 pixel image printed at 10×6.67 inches gives exactly 300 DPI on both axes.
What's the biggest I can print my photo at 300 DPI?
Divide your image's pixel dimensions by 300 - a 3000×2000 pixel photo could print at up to 10×6.67 inches while maintaining 300 DPI.
Why does the calculator use the lower of the two DPI values?
If your print aspect ratio doesn't exactly match your image's pixel aspect ratio, one dimension will have a higher effective DPI than the other - the lower value is the true limiting factor for overall image sharpness, since you can't exceed it without either cropping or distorting the image.
What DPI does a professional photo lab require for prints?
Most labs want at least 300 DPI at the final print size, though many accept down to 200 DPI without a visible quality drop - check your specific lab's requirements, since some large-format printers use different thresholds.
Can I increase my image's DPI without adding real detail?
You can resample (upscale) an image to report a higher DPI, but this doesn't add genuine pixel detail - it just spreads existing pixels over more print area or interpolates new ones, which can look softer or blurrier than a native high-resolution capture.
Is DPI for printing the same as PPI for screens?
They're closely related but describe different outputs - PPI (pixels per inch) describes a digital image or screen's resolution, while DPI (dots per inch) technically refers to a printer's physical dot output. This calculator treats them as effectively interchangeable for figuring out print sharpness, which is standard practice outside of strict prepress work.