DPI & PPI Calculator
Calculate dots per inch from image pixel dimensions and physical print size — assess print quality.
100% client-side · no upload
Horizontal DPI
Vertical DPI
Print quality
How to use
- Enter your image's pixel width and height (find these in your image editor or file info).
- Enter the intended print width and height in inches.
- The calculator shows the DPI and whether quality is suitable for professional printing (300 DPI+), home printing (150–299 DPI), or too low (<150 DPI).
Related tools
- Paper Size Reference — A4, Letter, Legal and more
- Page Margin Calculator — printable area in mm and inches
- Online Screen Ruler — calibrated cm and inch ruler
- Printable Grid Paper — adjustable cell size and color
More ways to use this tool
Frequently Asked Questions
- Is this DPI calculator free?
- Yes, completely free with no signup and no usage limits.
- Does my data leave my device?
- No. All calculations run in JavaScript inside your browser. No data is sent to any server.
- Does it work on mobile?
- Yes. The calculator is mobile-first and works on iPhone Safari and Android Chrome.
- What DPI is needed for professional printing?
- Professional print labs typically require 300 DPI or higher. 150–299 DPI is acceptable for home or office printing. Below 150 DPI images will appear noticeably blurry.
- What is the difference between DPI and PPI?
- PPI (pixels per inch) describes digital image resolution. DPI (dots per inch) describes printer output resolution. For most print calculations the two terms are used interchangeably — this calculator gives you the effective PPI/DPI of your image at a given print size.
Last updated: By jarvisbox