4K UHD video
3840 × 2160
Video · 16:9
| Pixel size | 3840 × 2160 px |
|---|---|
| Aspect ratio | 16:9 |
| Total pixels | 8,294,400 · 8.3 MP |
| Print size at 300 dpi | 325.1 × 182.9 mm |
| Orientation | Landscape |
| Uncompressed size | 23.7 MB |
| Rough JPEG size | 2025 KB |
Video formats are almost all 16:9; only vertical video flips it to 9:16.
How to read this
- If the aspect ratio is wrong, the platform crops it. Matching the ratio matters more than matching the pixel count.
- Print assumes 300 dpi: divide the pixels by 300 for inches, then multiply by 25.4 for millimetres.
- On screen, dpi is irrelevant — only the pixel size counts. Dpi only means something when you print.
- Enlarging a small image makes it blurry. Start bigger than you need and scale down instead.
Frequently asked questions
Q. What size is 4K UHD video?
3840×2160 pixels, a 16:9 aspect ratio — 8,294,400 pixels in all, about 8.3 megapixels.
Q. How big is 4K UHD video when printed?
At 300 dpi it comes out 325.1×182.9 mm — the pixels divided by 300 for inches, then multiplied by 25.4.
Q. How large is a 4K UHD video file?
Uncompressed, roughly 23.7 MB; saved as JPEG, usually around 2025 KB. A photograph and a flat graphic can differ several times over.
Q. What group does 4K UHD video belong to?
The video group, and it is wider than it is tall. Other sizes with the same ratio are listed below.
Same aspect ratio
When the ratio matches you can just resize — no cropping needed.