FullCalculator

Image Resolution Calculator

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Formula

Megapixels = (width × height) / 1,000,000. Print size = pixels / DPI. Aspect ratio = width:height simplified by GCD.

Frequently Asked Questions

What is a megapixel?
A megapixel is one million pixels. It is calculated by multiplying the image width by height in pixels and dividing by 1,000,000.
What DPI should I use for printing?
For high-quality photo prints, use 300 DPI. For everyday documents, 150 DPI is usually sufficient. For screen/web use, 72 DPI is standard.

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