Image Megapixel Checker
See how many megapixels a photo really has, and whether that is enough for printing, 4K screens or the web.
or browse filesdrop an image here or paste
See how many megapixels a photo really has, and whether that is enough for printing, 4K screens or the web.
or browse filesdrop an image here or paste
Drop in a photo and this megapixel checker reads its true resolution instantly: the megapixel figure headlines the panel, followed by the exact dimensions and pixel count, the file size, the aspect ratio, and - more usefully - what that resolution is actually good for. You see the biggest print that stays sharp at 300 DPI, whether the image fully covers a Full HD, 4K or 8K screen, and which camera class the resolution matches. Every value copies itself with a click, and Copy stats grabs the whole readout. Nothing is uploaded; the check runs entirely in your browser.
One megapixel is simply one million pixels, and an image's megapixel count is its width multiplied by its height: a 4000 by 3000 photo contains 12,000,000 pixels, so it is a 12 MP image. That also works backwards - a 12 MP photo in the common 4:3 shape is around 4000 by 3000 pixels, an 8 MP one around 3264 by 2448, and a 2 MP one around 1600 by 1200. Full HD video frames are 2.1 MP, 4K frames are 8.3 MP, and 8K frames are 33.2 MP, which is why the checker translates your photo's count into screen coverage directly.
Print sharpness is a pixels-per-inch question: at the standard 300 DPI, every inch of paper consumes 300 pixels in each direction. A 2 MP image prints sharply only up to about 4 by 6 inches; 8 MP carries a 8 by 10 inch print; 12 MP covers A4 with room to spare; and A3 or larger posters want 24 MP and up. The checker does this arithmetic for you and states the largest sharp print in both inches and centimeters. Prints viewed from a distance - posters on a wall rather than photos in hand - tolerate far less than 300 DPI, so treat the figure as the conservative bound.
A high megapixel count means many pixels, not necessarily good ones. Lens sharpness, sensor size, focus, motion blur and JPEG compression all decide how much detail those pixels really hold, which is why a sharp 12 MP photo from a good camera beats a blurry 48 MP one every time. File size is even less reliable as a quality signal, since compression can shrink a huge image into very few bytes. The honest reading: megapixels tell you the maximum detail an image could carry and the largest print or screen it can serve - the rest is up to the camera. For the full dimensions-focused readout of an image there is also the image size finder, and the DPI checker reads and changes the print-density metadata itself.
Open the photo in this checker - the megapixel figure is computed from the image's real pixel dimensions (width times height divided by one million) and shown instantly, together with the exact dimensions, pixel count and what the resolution is good for. Nothing is uploaded anywhere.
Take a photo at the camera's full default quality, then open that photo here. The checker shows the resolution the camera actually produced and the camera class it corresponds to. Note that many phones save 12 MP images from a 48 or 108 MP sensor by combining pixels - the saved file is what counts.
In the common 4:3 shape, about 4000 by 3000 pixels; in 3:2, about 4240 by 2832. Any width and height that multiply to roughly 12 million pixels are 12 MP - the shape can vary, the pixel count is the definition.
At the standard 300 DPI: about 2 MP for 4 by 6 inches, 8 MP for 8 by 10 inches, 12 MP for A4, and 24 MP or more for A3 and poster sizes. The checker states the largest sharp 300 DPI print for your exact image in inches and centimeters.
Not by themselves. Megapixels set the ceiling on detail, but lens quality, sensor size, focus and compression decide whether that ceiling is reached. A sharp lower-MP photo regularly outresolves a noisy or blurry higher-MP one.
No. The image is read and measured entirely in your browser on your device - nothing is transmitted, and the checker works offline once the page is open.