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The target here is 3840 × 2160 px: a landscape (wide) 16:9 image of 8.29 megapixels. The preset fills in both dimensions for you, so you only need to add the photo and download the result.
This is a standard screen resolution (4K UHD), so the image fills a display of that size exactly with no scaling.
| Output size | 3840 × 2160 px |
|---|---|
| Aspect ratio | 16:9 (landscape) |
| Standard name | 4K UHD |
| Total pixels | 8,294,400 (8.29 MP) |
| Prints at 300 DPI | 12.8 × 7.2 in (32.5 × 18.3 cm) |
Fitting a photo into 3840 × 2160 px
Resizing to a fixed width and height only gives a clean result when the photo has the same shape as the target. A shape mismatch has two outcomes: the picture is stretched, or part of it is cropped. Crop first, then resize, so you decide what is cut. This is how much of each common photo would be lost to fill 16:9:
| Starting photo | Cropped away to fill the shape |
|---|---|
| Phone photo (4000 × 3000, 4:3) | About 25% of the image |
| DSLR photo (6000 × 4000, 3:2) | About 16% of the image |
| Video frame (1920 × 1080, 16:9) | Nothing: same shape |
| Portrait phone photo (3000 × 4000, 3:4) | About 58% of the image |
Size, quality and file weight
8,294,400 pixels saved as a JPG at web quality typically weigh about 810 KB to 2.37 MB, depending on how much detail the picture contains. Flat graphics and screenshots saved as PNG compress very well when colors are simple, and poorly when they contain photographic gradients.
This is a large image. If you only need it for the web, consider a smaller size or WebP/AVIF to keep the file lightweight.
How large can it be printed?
These figures follow from the pixel count: print size = pixels ÷ DPI. Going above the 300 DPI row gives no visible benefit; going below it looks softer.
| Quality | DPI | Print size |
|---|---|---|
| Screen-resolution draft | 72 | 53.3 × 30 in (135.5 × 76.2 cm) |
| Acceptable for posters | 150 | 25.6 × 14.4 in (65 × 36.6 cm) |
| Photo quality | 300 | 12.8 × 7.2 in (32.5 × 18.3 cm) |
How to resize an image to 4K social media background
- Add your image. Select a photo or drag it onto the box above. JPG, PNG, WebP, AVIF, HEIC and BMP files are accepted, and the file stays on your device.
- Crop to 16:9 (recommended). The output is 3840 × 2160 px, a 16:9 shape. Cropping to that shape first with the built-in Crop tool decides what stays in frame and avoids distortion.
- Confirm the size and format. The preset fills in 3840 × 2160 px. Choose JPG for photos or PNG for graphics with sharp edges or transparency.
- Download the resized image. Click resize and save the file. The result uses Lanczos-3 resampling, which keeps edges clean when scaling down.
Related presets
Other presets with the same output size
Nearby sizes in this category
More 16:9 presets
More in this category: Device & Screen Resolution Sizes. For several photos at once, use the bulk image resizer.
Frequently asked questions
How do I resize an image to 4K social media background without stretching it?▼
What aspect ratio is 3840 × 2160?▼
How big will a 3840 × 2160 file be?▼
What if my photo is smaller than 3840 × 2160?▼
Which format should I use for 3840 × 2160?▼
How large can I print a 3840 × 2160 px image?▼
Is my image uploaded anywhere?▼
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