Megapixels to Dimensions Calculator
Estimate image width and height from megapixels and an aspect ratio.
What this tool calculates
Estimate image width and height from megapixels and an aspect ratio. The main inputs on this page are Megapixels, Aspect ratio width, Aspect ratio height. The result is intended to be readable immediately, with the explanation below available when you need to verify the method.
Method and calculation basis
Megapixels = width × height ÷ 1,000,000. Converting megapixels back to dimensions also needs an aspect ratio, so more than one width/height pair can represent the same megapixel count.
Worked examples
Print reference
3000 × 2400 px at 300 PPI corresponds to 10 × 8 inches.
Resolution check
6000 × 4000 px contains 24,000,000 pixels, or 24 MP.
Understanding the result
The output should be read in the units shown beside the result. If you are comparing alternatives, keep all unchanged assumptions identical and alter one input at a time. That makes it easier to see which value is responsible for the difference.
Assumptions, edge cases and accuracy
Dimensions and PPI are mathematical properties; they do not guarantee visual quality. Compression, resampling, focus and source quality still matter.
Sources and methodology
- W3C — Web image and browser standards where applicable
- Printer/image workflow documentation — PPI, dimensions and output-device requirements
Method reviewed for Instant Solvers V10.0 · October 2026. If you find a calculation or explanation that needs correcting, use the site Contact page and include the tool URL and the values you entered.