Resize Image for Printing — DPI Guide
Resize images for print at 300 DPI. Get the right pixel dimensions for 4×6, 5×7, 8×10, and poster-size prints. Free online tool.
Print quality depends on resolution — specifically, dots per inch (DPI). Screens display images at 72–96 DPI, but printers need 300 DPI for sharp, professional results. An image that looks great on your monitor may print as a blurry, pixelated mess if the resolution isn't high enough for the print size you've chosen.
Here's the math: multiply the print size in inches by 300 to get the required pixels. A 4×6 print needs 1200×1800 pixels. A 5×7 needs 1500×2100. An 8×10 needs 2400×3000. And a 16×20 poster demands 4800×6000 pixels. Our resizer makes this calculation effortless — enter the pixel dimensions for your target print size, and the tool scales your image while maintaining aspect ratio and maximizing quality.
Important: resizing cannot add detail that isn't in the original image. If your source photo is 1000×1000 pixels, enlarging it to 3000×3000 for a 10×10 print will produce a soft, interpolated result. For best results, always start with the highest-resolution original available and size down to your print dimensions.
After resizing, save as JPG at 95% quality or higher — most print services accept JPG and recommend avoiding additional compression that could introduce artifacts visible in the final print.
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Open Resize Image ToolFrequently Asked Questions
300 DPI is the standard for high-quality photo printing. 150 DPI is acceptable for large posters viewed from a distance. Below 150 DPI, individual pixels become visible and the print will look low-quality.
Multiply the print dimensions in inches by the DPI. For example, a 4×6 inch print at 300 DPI needs 1200×1800 pixels (4×300 = 1200, 6×300 = 1800).
You can resize it, but enlarging adds interpolated pixels — it doesn't create real detail. For prints, you're better off cropping a large original to the right aspect ratio rather than enlarging a small source.