Print Resolution DPI Calculator
Find the DPI of a print from pixel dimensions and print size, or the largest print you can make at a target DPI.
300 DPI is the usual target for sharp photo prints you hold in your hands; big wall art viewed from across the room still looks fine at 150 DPI or even less.
How it works
DPI, dots per inch, tells you how densely your pixels land on paper. Divide the pixel width by the print width in inches and you get the DPI across that edge — higher numbers mean finer, sharper detail.
In the first mode you give the tool your image's pixel size and the print size you want, and it reports the DPI on each axis plus the effective figure, which is the lower of the two since that's the limiting one.
Flip to the second mode and it works backward: give it a target DPI and it tells you the biggest print you can make before quality drops below that bar. It also grades the result so you know whether it's gallery-sharp or better suited to a distant wall.
Frequently asked questions
What DPI do I need for a good print?
300 DPI is the classic target for prints you hold and inspect closely. Larger pieces viewed from a distance look fine at 150 to 200, since your eye can't resolve individual dots that far away.
Why report the lower of the two DPI figures?
The sharpness of a print is only as good as its weakest axis. If width gives 250 and height gives 300, the print effectively looks like 250, so that's the number that counts.
Can I print bigger than the calculator suggests?
You can, but detail softens as DPI falls. For big wall art that's often fine because viewers stand back, and upsampling software can help, though it can't invent detail that was never captured.