Print DPI Calculator
Enter pixel dimensions and a print size to find the effective print DPI, or pick a target DPI to find the largest print size.
Maximum print size at target DPI
10 x 6.67 inches
Excellent for photo-quality printing at close viewing distance.
Effective DPI at desired width
300 DPI
Excellent for photo-quality printing at close viewing distance.
Image Print Studio
Upload an image, pick a print preset, and check effective DPI, required pixels, cropping and upscaling — before you print.
Upload an image to start. It stays in your browser and is never sent to a server.
How to use this calculator
1. Enter image dimensions in pixels. 2. Pick a target DPI to see the maximum print size. 3. Enter a desired print width to see its effective DPI.
Formula
Print width (in) = Pixel width / DPI. Pixel width needed = Print width (in) x DPI.
Paper sizes and viewing distance
| Size | Millimeters | Pixels at 300 DPI |
|---|---|---|
| A5 | 148 x 210 mm | 1748 x 2480 px |
| A4 | 210 x 297 mm | 2480 x 3508 px |
| A3 | 297 x 420 mm | 3508 x 4961 px |
| Viewing situation | Target DPI | Why |
|---|---|---|
| Close-up photo | 300 | Held in the hand; fine detail is visible. |
| Wall poster | 150 | Viewed from a few feet away; finer detail cannot be resolved. |
| Billboard | 72 | Viewed from far away; 300 DPI would be wasted pixels. |
Frequently asked questions
Is a higher DPI always better?
Not by itself. DPI only matters together with pixel dimensions and print size. A small image printed very large will still look soft, even if you label it 300 DPI.
Does changing DPI metadata add detail?
No. Changing the DPI number in a file changes the intended print size, not the pixels. Detail only comes from having enough pixels.