Native resolution 3456 × 2160 px at 2× · 250 PPI · 16.3″ · 16:10. Design at 1728 × 1080 and export assets at 2×.
| Property | Value |
|---|---|
| CSS viewport (portrait) | 1728 × 1080 px |
| CSS viewport (landscape) | 1080 × 1728 px |
| Native resolution | 3456 × 2160 px |
| Device pixel ratio | 2× |
| Pixel density | 250 PPI |
| Screen diagonal | 16.3 in |
| Panel size | 13.82 × 8.64 in |
| Aspect ratio | 16:10 |
| Total pixels | 7.46 MP |
| Released | 2024 |
| Operating system | Windows |
Among the 37 desktop and laptop displays on this site, the Dell XPS 16 (9640) has the 14th largest CSS viewport area. Its 1728 px width is 57 px above the 1671 px average for this category.
Viewport at each Windows display scale
Windows exposes the panel to the browser through the display-scale setting. Only one of these rows is the default; the others are one dropdown away, and users with 250 PPI in front of them do change it.
| Display scale | CSS viewport | devicePixelRatio | Notes |
|---|---|---|---|
| 100 % | 3456 × 2160 | 1× | More workspace, smaller text |
| 125 % | 2765 × 1728 | 1.25× | More workspace, smaller text |
| 150 % | 2304 × 1440 | 1.5× | More workspace, smaller text |
| 175 % | 1975 × 1234 | 1.75× | More workspace, smaller text |
| 200 % | 1728 × 1080 | 2× | Windows default for this panel |
| 225 % | 1536 × 960 | 2.25× | Larger text, less workspace |
| 250 % | 1382 × 864 | 2.5× | Larger text, less workspace |
Targeting the Dell XPS 16 (9640) in CSS
Device-specific media queries are brittle — a new model with the same width will not match. Use them for genuine per-device fixes only, and prefer width buckets for layout.
/* Target Dell XPS 16 (9640) specifically */
@media only screen
and (device-width: 1728px)
and (device-height: 1080px)
and (-webkit-device-pixel-ratio: 2) {
/* … */
}
/* More useful in practice — the width bucket it falls into */
@media (min-width: 1728px) { /* … */ }Compare with other Windows Devices models
| Device | CSS viewport | Native | DPR | PPI | Diagonal |
|---|---|---|---|---|---|
| Dell XPS 16 (9640) | 1728 × 1080 | 3456 × 2160 | 2× | 250 | 16.3″ |
| Framework Laptop 16 | 1707 × 1067 | 2560 × 1600 | 1.5× | 189 | 16″ |
| Surface Laptop 7 15″ | 1440 × 960 | 2496 × 1664 | 1.73× | 201 | 15″ |
| Dell XPS 14 (9440) | 1600 × 1000 | 3200 × 2000 | 2× | 260 | 14.5″ |
| ThinkPad X1 Carbon Gen 12 | 1280 × 800 | 1920 × 1200 | 1.5× | 162 | 14″ |
| HP Spectre x360 14 | 1280 × 853 | 2880 × 1920 | 2.25× | 247 | 14″ |
| ASUS Zenbook 14 OLED | 1280 × 800 | 2880 × 1800 | 2.25× | 243 | 14″ |
| Surface Laptop 7 13.8″ | 1280 × 853 | 2304 × 1536 | 1.8× | 201 | 13.8″ |
| Dell XPS 13 (9350) | 1280 × 800 | 1920 × 1200 | 1.5× | 169 | 13.4″ |
Questions about the Dell XPS 16 (9640) screen
What is the screen size of the Dell XPS 16 (9640)?
The Dell XPS 16 (9640) has a 16.3-inch display. In CSS the viewport measures 1728 × 1080 px in portrait, and the panel itself has 3456 × 2160 physical pixels at 250 PPI.
What resolution should I design for on the Dell XPS 16 (9640)?
Design at 1728 × 1080 and export assets at 2×. That gives you 3456 × 2160 px images, which is exactly what the panel renders. Designing directly at 3456 × 2160 means every measurement is 2 times larger than the CSS values you will write.
What is the device pixel ratio of the Dell XPS 16 (9640)?
The Dell XPS 16 (9640) reports a device pixel ratio of 2. One CSS pixel therefore covers 4 device pixels. You can read it in JavaScript with window.devicePixelRatio.
Does the Dell XPS 16 (9640) always report 1728 px?
No — on Windows the CSS viewport is the panel divided by the display scale, and that is a user setting. 1728 × 1080 is what you get at the 200 % scale Windows recommends for this panel, which is what most units ship with. Change it in Settings → System → Display and every CSS pixel measurement changes with it. The table above lists the viewport at each scale step.
Related
window.innerWidth/innerHeight reported by the stock browser with no browser chrome. See methodology and sources.