More physical area, unchanged CSS geometry
At the same reference dimensions, content, fonts and browser settings, the pair can share a layout-size check. The larger physical rectangle does not guarantee identical rendering on the two real devices.
Galaxy S25 Ultra screen size
Galaxy S25 Ultra: 6.9″, 1440 × 3120, 498 PPI, 384 × 832 CSS viewport at DPR 3.75. Its panel grows from the preceding Ultra while the tracked pixel grid, CSS canvas and DPR reference stay fixed. The physical display is larger, but these references do not add layout space.
To proportion
6.9″
- Display size
- 6.9″ (17.5 cm) diagonalofficial
- Resolution
- 1440 × 3120 pxofficial
- Pixel density
- 498 PPIofficial
- Aspect ratio
- 19.5:9calculated
- Physical size (display)
- 2.89″ × 6.26″ (7.3 × 15.9 cm)calculated
- CSS viewport
- 384 × 832 pxreference
- Device pixel ratio
- 3.75reference
- Release year
- 2025
Model-specific guidance
What this means
A generous canvas can hide defects
The Ultra is useful for expansive media and multi-column behavior, but it should not be used to approve compact navigation or dense forms by itself.
Worked example · reference dimensions
Does a larger physical screen add layout space?
Relative to Galaxy S24 Ultra, Galaxy S25 Ultra has about 3% more ideal rectangular panel area. Its CSS reference changes by 0 in width and 0 in height.
Physical display rectangles
CSS reference canvases
Panel width and height come from the recorded diagonal and pixel aspect ratio; area is width × height. Both records have the same panel pixel dimensions and DPR reference. The physical and CSS groups use separate scales. Area growth is not a claim about the same percentage growth in text width or height. Rectangles exclude rounded corners and cutouts.
CSS canvas, DPR and workspace values are references, not manufacturer guarantees or live browser measurements. Matching references alone do not guarantee identical fonts, line breaks or rendering across real devices.
Recorded facts and sources
- Galaxy S25 Ultra · Facts verified 2026-09-16Recorded source 1
- Galaxy S24 Ultra · Facts verified 2026-09-16Recorded source 1 · Recorded source 2
These are the dates of the recorded fact checks. A hardware specification source does not establish a browser viewport. Calculations and illustration assumptions are described above; no new device measurements are claimed.
Compare this device
The specifications below come from the device records; the notes explain why each comparison is useful.
| Device configuration | Matched to | Screen | Panel | Viewport / workspace | PPI |
|---|---|---|---|---|---|
| Galaxy S25 Ultra Current page | Galaxy S25 Ultra | 6.9″ | 1440 × 3120 | 384 × 832 | 498 |
| Galaxy S24 Ultra The predecessor demonstrates how identical layout-facing values can be presented on a smaller physical panel. | Galaxy S25 Ultra | 6.8″ | 1440 × 3120 | 384 × 832 | 505 |
| Galaxy S25 The base model provides the tighter same-generation boundary needed to expose compression and wrapping failures. | Galaxy S25 Ultra | 6.2″ | 1080 × 2340 | 360 × 780 | 416 |
For developers
For developers
/* Galaxy S25 Ultra — portrait reference, not a breakpoint */
viewport: 384 × 832 CSS px
panel: 1440 × 3120 · DPR 3.75
/* Test immediately below and above your layout breakpoints. */Tailwind breakpoint
base
0px-639px
Bootstrap breakpoint
xs
0px-575px
Image slot example
1536 × 864
384px wide at DPR 3.75
Responsive testing plan
Galaxy S25 Ultra responsive workflow
Use the 384 × 832 CSS px at DPR 3.75 as a real QA target, then pair it with nearby widths for regression testing.
Model-specific checks
- Inspect large media, split cards and maximum-width containers here, then validate their compact states on the base model.
Phones with a similar screen size
Devices with a similar viewport
Devices with a similar DPR
Sources and review dates
Values marked official come from manufacturer specifications; calculated values are derived from them; reference values are developer layout references and can vary with browser, zoom and operating-system settings.
Sources: Samsung · Facts reviewed 2026-09-16
Content reviewed 2026-10-22
Related tools
- Device Screen SizesBrowse sourced screen sizes, resolutions, CSS viewports, DPR and PPI for phones, tablets and laptops, with links to model-level specifications.
- Phone Screen SizesPhone screen size chart with display inches, resolution, PPI and aspect ratio; viewport references where available for tracked iPhone, Galaxy and Pixel phones, including foldables.
- Screen Size ComparisonCompare display dimensions, complete video pictures and A4 page size. View screens side by side or estimate physical size after calibration.
- Viewport Size CheckerSee your browser's CSS viewport size and window size live. Updates as you resize — with current responsive breakpoint for developers.
- Responsive Breakpoint CheckerCheck the current responsive breakpoint live, compare Tailwind and Bootstrap defaults, and copy media queries for common viewport widths.
- Responsive Image CalculatorCalculate responsive image export sizes from CSS pixels and DPR. Generate srcset, sizes and CSS image-set snippets for crisp images.
- PPI CalculatorCalculate PPI from resolution and screen size. Instant results with the formula worked through your numbers, plus physical dimensions and dot pitch.