DPI (dots per inch) is a resolution unit indicating the number of dots (pixels) in one inch. It determines the actual size of an image when printed.
Enter the pixel dimensions and DPI of an image to calculate its actual printed size in inches. Useful for print production or high-resolution image work.
For example, printing a 1920px-wide image at 96 DPI gives an actual width of 20 inches.
DPI (dots per inch) links digital pixels to physical size: with a known pixel count and print resolution, you can work out how large an image will print in inches or centimetres.
Enter the image dimensions in pixels and the DPI to get the physical print size, or enter the target size to find the required resolution.
DPI originally counted printer dots per inch; for screens the meaningful figure is pixels per inch, and CSS resolution is anchored at 96 dpi. A 27-inch 4K monitor works out near 163 PPI, far beyond the 96 dpi assumption, which is why operating systems scale the interface by 150 % or 200 %. For photographic printing, 300 dpi remains the usual standard.
Inches = pixels / DPIUse 300 DPI for photographic and professional print, 150 DPI for posters viewed from a distance, and 72–96 DPI only for screen display. A 3,000-pixel-wide image prints 10 inches wide at 300 DPI.
No — the DPI metadata only declares how large the pixels should print. The actual sharpness depends on the pixel dimensions, so raising the DPI of a small image just makes it print smaller, not sharper.
At 300 dpi that is about 1181 × 1772 pixels. At 150 dpi — acceptable for a poster seen from a distance — half of each dimension is enough, roughly 591 × 886 pixels.
No. DPI is metadata that maps a pixel count onto a physical size. Changing it changes only the printed dimensions; the pixel count and the detail stay identical.
2026-10-19