Updated June 17, 2026
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DPI stands for dots per inch. It describes how many individual ink dots a printer places within one inch of printed output. Higher DPI means more dots packed into each inch, producing finer detail and smoother gradients in print.
What does DPI mean in practice?
A printer set to 300 DPI places 300 dots in every horizontal inch and 300 in every vertical inch. On a 4x6 inch print, that is 1,200 x 1,800 = 2,160,000 dots total. The higher the DPI for a given print size, the more pixels your original image must contain to fill those dots without stretching.
Is 600 DPI higher than 300 DPI?
Yes. 600 DPI means twice as many dots per inch as 300 DPI, producing finer detail. For most photo printing, 300 DPI is the standard for sharp results viewed at normal distances. 600 DPI is used for very detailed images or prints meant to be viewed closely, like fine art prints or technical documents.
Is 600 DPI or 1200 DPI better?
1200 DPI is technically higher quality, but for standard photo prints, the human eye cannot perceive the difference between 300 and 600 DPI at normal viewing distances (12 inches or more). 1200 DPI is useful for line art, text, and images examined very closely.
What is 300 DPI in resolution?
300 DPI means your image needs 300 pixels for every inch of printed output. A 5x7 inch print at 300 DPI requires 1,500 x 2,100 pixels. A 4x6 print at 300 DPI needs 1,200 x 1,800 pixels. Use the Print Size Calculator to see your image's maximum print size at 300 DPI, or check DPI vs PPI for the distinction between printing and screen resolution.
Try the Print Size Calculator
Enter your image pixel dimensions and target DPI to see the largest sharp print you can make, instantly.