DPI Calculator
Calculate DPI, print size or pixel dimensions for any image. Convert between pixels and physical print size for crisp, sharp output. Free and instant.
Convert between pixels, DPI and physical print size, which is essential for printing and scanning. Enter any two values and the calculator fills in the third instantly, all locally in your browser.
How it works
What this calculator does
Convert between pixels, DPI and physical print size, which is essential for printing and scanning. Enter any two values and the calculator fills in the third instantly, all locally in your browser.
Why the math matters
DPI decides whether a print looks crisp or pixelated. Accurate numbers stop you from paying for a blurry print.
Frequently asked questions
What is a good DPI for printing?
300 DPI for crisp close-up prints, while 150 DPI is acceptable for larger posters viewed from a distance.
How do I find the DPI of an image?
Divide the pixel dimension by the physical size in inches. A 3000 by 2000 image printed at 10 inches wide is 300 DPI.
Does DPI affect file size?
Not directly. File size comes from pixel count and compression. DPI only tells the printer the physical size, so it changes the print, not the bytes.