Megapixel Calculator

Megapixel Calculator: Enter image width and height in pixels to get the megapixel count (total pixels divided by one million) and estimated print sizes at 300, 200, 150, and 100 DPI. Lower DPI yields a larger physical print with less detail per inch — useful for determining the maximum acceptable print size from a given source image.

For sharp photo-quality prints, 300 DPI is the industry standard. Large-format posters viewed from a distance work at 150 DPI or even 100 DPI. The calculator shows both inches and centimeters, so you can plan for lab printing in the US or international vendors.

On 09/21/2026, an Austin photographer with a 45-megapixel file can quickly verify it supports a 20×15 inch print at 300 DPI — suitable for a $1,200 gallery canvas. The calculation runs entirely in the browser, free and instantly offline with no signup required ever.

A Chicago designer preparing a 12-megapixel image for a $400 event poster can confirm it prints at 13.3×8.9 inches at 300 DPI, or 26.7×17.8 inches at 150 DPI. This determines whether upscaling or a higher-resolution source is needed before sending to the printer.

Miami studios validating camera specifications on 09/20/2026 can enter sensor dimensions to confirm the published megapixel count matches reality. A "24MP" sensor that actually outputs 5,760×4,320 is 24.9 MP — the calculator reveals the exact figure, not the marketing round number.

A New York editorial team checking a 6-megapixel thumbnail on 09/19/2026 can see it only supports a 4×3 inch print at 300 DPI — too small for a full-page magazine layout. The tool helps editors decide when to request the original high-resolution file from the photographer instead of using the web export.