Print calculators
Image, printing and dimension tools — check print quality and convert between pixels and physical sizes.
Pixels to inches & centimetres
See how big an image prints, in inches and cm, at a given resolution.
DPI calculator
What DPI will my print be at.
Print-size calculator
Largest size you can print an image at.
Aspect-ratio calculator
Simplified ratio from any width and height.
Image-resize dimensions
Resize an image keeping its proportions.
Paper-size converter
Standard paper sizes in mm and inches.
Poster-dimension helper
Largest poster size at a minimum quality.
Photo print-size calculator
Resolution needed for a target photo size.
Screen-dimension calculator
Width and height from diagonal and ratio.
Pixels, print size and resolution
An image file has a size in pixels; a print has a size in inches or centimetres. Resolution links the two: print width = pixel width ÷ pixels per inch. The print-size calculator works out the largest print you can make from an image at a chosen resolution.
Choose a tool from the size you know
- Have an image and a target quality? Use Print size to find the maximum output dimensions.
- Have a target photo size? Use Photo print size to find the pixel dimensions needed.
- Need new pixel dimensions without stretching? Use Image resize; check the aspect ratio if cropping is part of the task.
For example, a 2400 × 3000 pixel image at 300 pixels per inch maps to 8 × 10 inches before cropping. This is the unit conversion, not a guarantee of how a particular printer, paper or viewing distance will look.
DPI and PPI
PPI (pixels per inch) describes the image or screen; DPI (dots per inch) strictly describes a printer's output, though the terms are often used interchangeably. Around 300 PPI is a common target for photos viewed up close, while large posters viewed from a distance can look fine at much lower resolution.
Keep the aspect ratio
Resizing to a different shape stretches or crops the image. Use the aspect-ratio calculator or image-resize dimensions tool to find matching sizes before exporting.
Paper sizes
A-series paper (A4, A3 …) keeps the same proportions at every size, but US Letter and photo print sizes use different shapes. The paper-size converter lists exact dimensions.