Free tool · Printable wall art
Print DPI Calculator & Image Resolution Checker
Know whether your artwork has enough pixels for the print size you want. Open the free PrintRatio checker to compare your file with popular framing dimensions and review estimated print resolution.
Open Free DPI Checker →No purchase required to view pixel and print-size estimates. Artwork processing tools are separate.
What you can check
How do you calculate DPI for printing?
For an image with the same shape as the print, divide the pixel width by the print width in inches, and the pixel height by the print height in inches. Use the lower value as the limiting effective DPI. If the image and paper have different aspect ratios, the result depends on whether the image is cropped, fitted with borders, or otherwise repositioned.
An image that is 3000 × 4500 pixels printed at 10 × 15 inches has 300 effective pixels per inch on both axes. At 20 × 30 inches, it has 150. Changing a file's DPI metadata alone does not add pixels or visual detail.
How many pixels do you need at 300 DPI?
For exact-matching aspect ratios, these pixel dimensions provide 300 pixels per inch:
| Print size | Pixels for 300 PPI | Aspect ratio |
|---|---|---|
| 8 × 10 in | 2400 × 3000 px | 4:5 |
| 12 × 16 in | 3600 × 4800 px | 3:4 |
| 16 × 20 in | 4800 × 6000 px | 4:5 |
| 18 × 24 in | 5400 × 7200 px | 3:4 |
| 20 × 30 in | 6000 × 9000 px | 2:3 |
| 24 × 36 in | 7200 × 10800 px | 2:3 |
These are mathematical 300 PPI pixel targets, not guarantees of perceived image sharpness or print quality. Source detail, paper, viewing distance and printing method also matter.
Full bleed crop vs fit: why the results differ
Crop: the image fills the print completely, but portions may be trimmed to match a new shape. Fit: the whole artwork stays visible, with margins where needed. The calculator should reflect how the artwork is placed instead of assuming every size has the same crop.
When should you upscale?
Upscaling increases output pixel dimensions; AI upscaling may also infer new textures. It cannot guarantee faithful detail that was absent in the source. Review the result at print size before selling or printing it. PrintRatio also offers an optional AI Print Upscaler and exact print-ratio exports for digital wall-art workflows.
Check your artwork before exporting
Use PrintRatio’s free DPI & Size Checker, then explore print ratio files or listing mockups when your artwork is ready.
Check Artwork Resolution →Frequently asked questions
Does setting 300 DPI make an image higher resolution?
No. DPI/PPI metadata describes print density; pixel dimensions and actual source detail determine how much image information is available.
Is 300 DPI required for every wall art print?
300 PPI is a common high-quality target at close viewing distances. Larger prints can look good at lower effective resolution depending on image detail, print method and viewing distance.
Is an AI upscaled image the same as a native high-resolution image?
No. AI upscaling may help enlarge or improve the appearance of details, but some output details are inferred rather than recorded by the original image.
Can I check portrait and landscape artwork?
PrintRatio's artwork workflow supports both portrait and landscape images. Verify the print orientation and the desired fit mode before export.