Print Resolution (DPI) Calculator
Find the DPI a photo will print at for a given size, plus the maximum print size at 300, 200, and 150 DPI. Runs in your browser.
300 DPI — excellent: meets the 300 DPI standard for sharp photo prints.
DPI (dots per inch) = image pixels ÷ print size. 300 DPI is the standard for sharp photo prints held at reading distance; large prints (posters, banners) viewed from farther away look fine at 150–200 DPI. The effective resolution is set by the more limiting dimension. Everything runs in your browser.
About this tool
DPI — dots per inch — measures how densely an image's pixels are packed when printed, and it is the single best predictor of whether a print will look crisp or soft. The math is simple: DPI equals the image's pixel dimension divided by the printed dimension in inches, so a 6000-pixel-wide file printed 20 inches wide resolves at 300 DPI. This calculator computes the effective resolution for any image size and print size (in inches or centimeters), reports the DPI along each axis, and bases its verdict on the more limiting dimension. The widely used standard for sharp photographic prints viewed at normal reading distance is 300 DPI; that is the target professional labs and photo books assume. But the right number depends on viewing distance: large prints are seen from farther away, so posters and wall art look perfectly good at 150–200 DPI, and billboards at far less. The tool also works the question in reverse, showing the largest print you can make from your file at 300, 200, and 150 DPI — handy when deciding how big you can go before quality suffers. Two things worth remembering: 'upscaling' a file in software adds pixels but not real detail, so it does not truly raise effective resolution; and DPI (a print measure) is often confused with PPI (pixels per inch, a digital measure) and with screen resolution, which is typically around 72–96 PPI and irrelevant to print sharpness. Use the effective DPI here to choose a print size your image can support, or to confirm a file is big enough for a size you have in mind. Everything runs in your browser; nothing is uploaded.
How to use it
- Enter your image's pixel width and height.
- Enter the print width and height, choosing inches or centimeters.
- Read the effective DPI and the quality verdict.
- Check the max-size rows to see how large you can print at 300, 200, or 150 DPI.
Frequently asked questions
- How is print DPI calculated?
- DPI = image pixels ÷ print size in inches. A 3000-pixel dimension printed at 10 inches is 300 DPI. The effective resolution is set by the more limiting of the width and height.
- What DPI do I need for a good print?
- 300 DPI is the standard for sharp photo prints viewed at reading distance. 200 DPI is good, 150 DPI is acceptable for larger prints seen from a distance, and below ~150 DPI prints start to look soft or pixelated up close.
- Does viewing distance change the DPI I need?
- Yes. The farther a print is viewed, the lower the DPI needed. Photo books and small prints want 300 DPI; posters look fine at 150–200 DPI; large banners need far less because no one inspects them up close.
- Can I just upscale my image to get more DPI?
- Software upscaling adds pixels by interpolation but not genuine detail, so it does not truly improve sharpness. The honest effective resolution is based on your original pixel count.
- What is the difference between DPI and PPI?
- PPI (pixels per inch) describes a digital image's pixel density; DPI (dots per inch) describes the printed output. They are often used interchangeably for this calculation, but screen resolution (~72–96 PPI) is unrelated to print quality.
- Is anything uploaded?
- No. All calculations run in your browser; your image is never uploaded — only its dimensions are used.