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Megapixel Calculator
Convert pixel dimensions into megapixels and aspect ratio.
Megapixels
—
Total resolution.
| Total pixels | — |
|---|---|
| Aspect ratio | — |
| Width | — |
| Height | — |
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Enter your figures above to see the step-by-step working.
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How the Megapixel Calculator Works
A megapixel is one million pixels. Multiply an image’s width by its height in pixels and divide by a million: a 4000×3000 photo is 12 megapixels. That count sets how much detail the image holds and how large it can be printed or cropped.
More megapixels isn’t everything — lens quality, sensor size and light matter too — but it does determine maximum print size and cropping room.
megapixels = width × height ÷ 1,000,000
Frequently Asked Questions
How do you calculate megapixels?
Multiply the pixel width by the pixel height and divide by one million. 4000 × 3000 = 12 MP.
How many megapixels do I need?
12 MP prints beautifully at typical sizes; 24 MP+ gives more room to crop or print large.
Do more megapixels mean better photos?
Not on their own — sensor size, lens and light matter as much as pixel count.
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