Print and pixel calculators
Move between pixels and paper without losing the unit, density or rounding assumption behind the result.
Calculators in this section
Find pixel density from pixels and print dimensions.
Photo print sizeConvert pixel dimensions and PPI into inches and centimeters.
Print size to pixelsTurn physical dimensions and PPI into pixels.
Bleed sizeAdd bleed to trim dimensions and calculate pixels.
Aspect ratioReduce a ratio and scale one matching dimension.
Geometry before judgment
The tools report dimensions and density rather than claiming an image is universally print-ready. Viewing distance and production method still matter.
Printer specifications remain authoritative
Bleed, safe area, crop marks, screening and delivery settings vary by product and provider. Use the result to prepare a file, then confirm the actual specification.
Working in either direction
Starting from an image, the PPI calculator tells you the density a chosen print size would give, and the photo print size calculator answers the same question the other way round: how large this file can go at 300, at 150, or at whatever the printer asked for. Both report the two axes separately, which is how a mismatch in proportions shows up before it reaches the press.
Starting from the paper, print size to pixels gives the canvas to build on, and the bleed calculator extends that canvas past the trim on all four edges so nothing comes back with a white sliver along the cut. The aspect ratio calculator sits across both directions: it reduces a ratio, and it solves the second dimension when you know the first.
Frequently asked questions
Are PPI and DPI the same?
No. These tools use PPI for image pixels per inch, which is a property of your file. A printer’s DPI counts ink dots per inch, which is a property of the device, and a press may lay several dots down to reproduce one pixel.
Does changing PPI add pixels?
Not by itself. Without resampling, changing resolution metadata changes the intended physical size, not the pixel array. Resampling upwards does add pixels, but it derives them from the ones already there rather than recovering detail.
In what order should I use these tools?
Check what you have with the PPI calculator or the photo print size calculator, settle the proportions with the aspect ratio calculator, then build the canvas with print size to pixels and the bleed calculator.
Do they work in millimetres and centimetres?
Yes. Every tool that takes a physical size accepts inches, centimetres or millimetres, and converts internally, because PPI is defined per inch.