What is 16:9 in pixels at 4K?
3840 × 2160 px
A 16:9 frame delivered at 4K is 3840 × 2160 pixels, 1.78 times as wide as it is tall. HD and UHD broadcast, YouTube, nearly every camera.
How that is worked out
width = height × (ratio width ÷ ratio height)
2160 × 1.7778 = 3840
Worth knowing
- Both numbers are even and the shape is exactly 16:9, so nothing is given up to satisfy the 4:2:0 requirement that dimensions divide by two.
- That is 8.29 MP per frame — the same pixel count as a full 4K 3840 × 2160 frame, just arranged in a different shape.
- Dropped into a 3840 × 2160 timeline it fills the frame edge to edge, with no bars to crop out later.
- Where you see it: HD and UHD broadcast, YouTube, nearly every camera.
16:9 at every delivery size
| Delivery | Pixels | Per frame |
|---|---|---|
| 480p | 854 × 480 | 0.41 MP |
| 720p | 1280 × 720 | 0.92 MP |
| 1080p | 1920 × 1080 | 2.07 MP |
| 1440p | 2560 × 1440 | 3.69 MP |
| 4K — this page | 3840 × 2160 | 8.29 MP |
Every value is rounded to an even number of pixels: H.264 and H.265 subsample colour in 2 × 2 blocks and reject odd dimensions.
Ratios either side of 16:9 at 4K
| Ratio | Pixels | Decimal | Bars inside 3840 × 2160 |
|---|---|---|---|
| 5:4 | 2700 × 2160 | 1.25:1 | 570 px left and right |
| 4:3 | 2880 × 2160 | 1.33:1 | 480 px left and right |
| 3:2 | 3240 × 2160 | 1.50:1 | 300 px left and right |
| 16:9 — this page | 3840 × 2160 | 1.78:1 | none — exact fit |
| 1.85:1 | 3840 × 2076 | 1.85:1 | 42 px top and bottom |
| 1.9:1 | 3840 × 2022 | 1.90:1 | 69 px top and bottom |
| 2:1 | 3840 × 1920 | 2.00:1 | 120 px top and bottom |
Need it for other values?
Scale width and height to 16:9, 9:16, 4:5, 2.39:1 or a custom ratio, with pixel dimensions at 1080p and 4K.