Megapixel Calculator
Enter image width and height or upload a file to calculate megapixels, total pixels, aspect ratio, 300 DPI print size, and practical usage guidance.
Usage guidance
12 MP is enough for many prints and much larger than most website display needs.
Convert dimensions into megapixels
Manual or uploaded dimensions
Type width and height yourself or let the browser read dimensions from an uploaded image.
Aspect ratio and print estimate
See simplified aspect ratio and approximate 300 DPI print size alongside megapixels.
Web and print guidance
Classify images as small, medium, large, or very large so you can choose resizing and compression steps.
Megapixel examples
| Dimensioner | Megapixels | Common use |
|---|---|---|
| 1920 x 1080 | 2.07 MP | HD screens and video thumbnails. |
| 3000 x 2000 | 6.00 MP | General photos and moderate prints. |
| 4000 x 3000 | 12.00 MP | Large source photos and cropping room. |
| 6000 x 4000 | 24.00 MP | High-resolution cameras and larger prints. |
Hvordan det virker
-
1
Enter dimensions
Type pixel width and height, or upload an image to fill them automatically.
-
2
Read megapixels
Review total pixels, aspect ratio, print estimate, and image class.
-
3
Use the result
Decide whether the image should be resized, compressed, or kept as a high-resolution source.
How megapixels affect image quality and file size
Megapixels measure total pixel count: width multiplied by height, divided by one million. More megapixels can provide more detail and cropping room, but they also increase storage, upload time, and potential page weight. A high-megapixel original is useful as a master file, while website delivery copies should usually be resized to match real display needs.
For SEO and page speed, avoid uploading camera originals directly into pages unless users need zoomable detail. Generate smaller responsive versions, compress them with a suitable format, and keep the original only for editing or downloads.
Ofte stillede spørgsmål
How do you calculate megapixels?
Multiply width by height, then divide by 1,000,000.
Is more megapixels always better?
No. More megapixels can help with print and cropping, but oversized web images slow pages down.
Can I upload an image to calculate megapixels?
Yes. The calculator reads image dimensions locally in your browser.
How many megapixels is 4000 x 3000?
4000 x 3000 is 12,000,000 pixels, or 12 megapixels.
Megapixel Calculator last reviewed: Jul 23, 2026.