Image Print Resolution (DPI) Calculator
Image Print Resolution (DPI) Calculator
Enter your image's pixel dimensions and the size you want to print it at to check the resulting DPI (dots per inch) and whether that's high enough for good print quality.
300 DPI or higher is the standard benchmark for photo-quality prints viewed up close, while 150-199 DPI is generally acceptable for larger pieces like posters that are meant to be viewed from a greater distance, where individual dots are less perceptible to the eye. Because width and height can scale to slightly different DPI values if an image's aspect ratio doesn't perfectly match the print size, the calculator reports the "effective DPI" as the lower of the two — the true limiting factor for how sharp the print will actually look.
- Formula: DPI = Pixel Dimension ÷ Print Dimension (in inches), calculated separately for width and height.
- Quality guide: 300+ DPI is excellent (standard for photo prints), 200-299 is good, 150-199 is fair (acceptable for posters viewed from a distance), under 150 will look pixelated up close.
- Effective DPI is the lower of the horizontal and vertical values, since that's the limiting factor for print sharpness.
Why are my horizontal and vertical DPI different?
This happens when the print size you've chosen doesn't exactly match your image's aspect ratio — one dimension ends up slightly more stretched than the other.
What DPI do professional print shops require?
300 DPI is the most commonly cited standard for sharp photo-quality prints, though large posters viewed from a distance can look fine at lower DPI since viewers aren't as close to the surface.
Image Print Resolution (DPI) Calculator
Enter your image's pixel dimensions and the size you want to print it at to check the resulting DPI (dots per inch) and whether that's high enough for good print quality.
300 DPI or higher is the standard benchmark for photo-quality prints viewed up close, while 150-199 DPI is generally acceptable for larger pieces like posters that are meant to be viewed from a greater distance, where individual dots are less perceptible to the eye. Because width and height can scale to slightly different DPI values if an image's aspect ratio doesn't perfectly match the print size, the calculator reports the "effective DPI" as the lower of the two — the true limiting factor for how sharp the print will actually look.
- Formula: DPI = Pixel Dimension ÷ Print Dimension (in inches), calculated separately for width and height.
- Quality guide: 300+ DPI is excellent (standard for photo prints), 200-299 is good, 150-199 is fair (acceptable for posters viewed from a distance), under 150 will look pixelated up close.
- Effective DPI is the lower of the horizontal and vertical values, since that's the limiting factor for print sharpness.
Why are my horizontal and vertical DPI different?
This happens when the print size you've chosen doesn't exactly match your image's aspect ratio — one dimension ends up slightly more stretched than the other.
What DPI do professional print shops require?
300 DPI is the most commonly cited standard for sharp photo-quality prints, though large posters viewed from a distance can look fine at lower DPI since viewers aren't as close to the surface.