Enter your image size (or drop the file) and see the biggest sharp print — plus whether it's good enough for 10×15, 30×40, A4, A3 and A2.
Before you send a photo to print, this DPI checker answers the real question: will it look sharp? Print sharpness depends on DPI — dots (pixels) per inch. The standard for photo prints is 300 DPI. To find the biggest sharp print, divide the image's pixel width and height by the DPI: a 4000×3000 px photo at 300 DPI prints crisply up to about 13.3×10 inches (34×25 cm). This tool converts that to centimetres and checks it against common sizes.
300 DPI for photos and anything viewed up close; 150–200 DPI is fine for large posters and banners seen from a distance; below 150 DPI starts to look soft or pixelated. Everything is measured in your browser — if you drop an image, its dimensions are read locally and the file never leaves your device.
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