Print PPI Calculator
Find the actual pixels-per-inch resolution of an image at a specific print size. If the result is below the DPI your print service requires, the print will be soft. This is a print measurement, not a screen-density measurement - for monitors and phones use the Screen PPI Calculator.
What the quality rating means
| Effective PPI | Quality |
|---|---|
| 300+ | Excellent for close-up photo prints |
| 200–299 | Good for most prints |
| 150–199 | Acceptable for canvas and posters |
| Below 150 | Soft up close; only for large-format, distant viewing |
When to use this calculator
- A print came back soft and you want to know whether resolution was the cause.
- You are about to order a print and want to check the effective PPI first.
- A customer asks whether their file is good enough for a specific product.
- You want to compare the same photo at several print sizes before choosing.
Worked examples
- 4000 × 3000 px at 12 × 9 in: 333 PPI - excellent for close-up viewing.
- 4000 × 3000 px at 20 × 15 in: 200 PPI - good for canvas and medium prints.
- 4000 × 3000 px at 24 × 18 in: about 167 PPI - acceptable for posters viewed from a distance.
- 3000 × 2000 px at 10 × 6.67 in: 300 PPI - a standard photo print at full quality.
Why the lowest value decides the result
If the image's aspect ratio does not match the print size and the file is stretched, the width and height give different PPI values. The lower number determines how soft the print looks in that direction, so the tool reports it as the effective PPI. The correct fix is to crop or resize proportionally rather than stretching - use the crop calculator to find the right dimensions.
PPI is not the only factor
A file with high PPI can still look poor if it was heavily cropped, captured with motion blur or upscaled from a smaller original. Conversely, a modest 150 PPI print can look excellent on a large poster viewed from several feet away. Treat the quality rating as one signal, not a verdict: sharpness, viewing distance, paper texture and print process all matter.
Common mistakes
- Judging resolution by the JPEG's megabytes instead of its pixel dimensions.
- Using the higher of two PPI values while the lower one limits the print.
- Demanding 300 PPI for a product that will be viewed from across a room.
- Upscaling the file in software and assuming the effective PPI is now honest.
Related tools
How big can I print? · Print size calculator · Print resolution complete guide
Frequently asked questions
How do I calculate PPI from pixels and print size?
Divide the pixel dimension by the print dimension in inches. A 4000 × 3000 px image printed at 12 × 9 in gives 4000 ÷ 12 = 333 PPI horizontally and 3000 ÷ 9 = 333 PPI vertically.
What if my width and height give different PPI values?
That happens when the aspect ratio of the image differs from the print size and the image is stretched. Print at a matching aspect ratio, or crop the image, so both values match.