Galaxy Z Fold 5 vs Galaxy S24 Ultra: screen size and viewport
The Galaxy Z Fold 5 lays web pages out at 344 × 882 CSS px with a pixel ratio of 2.625; the Galaxy S24 Ultra at 384 × 832 with 2.813. The Galaxy S24 Ultra is 40 px wider, and the Galaxy Z Fold 5 is 50 px taller.
The two screens side by side
Specs compared
| Spec | Galaxy Z Fold 5 | Galaxy S24 Ultra | Difference |
|---|---|---|---|
| Viewport, portrait (CSS px) | 344 × 882 | 384 × 832 | −40 px wide, +50 px tall |
| Device pixel ratio | 2.625 | 2.813 | −0.188 for the Galaxy Z Fold 5 |
| Physical resolution | 903 × 2315 | 1080 × 2340 | Galaxy S24 Ultra: 21% more pixels |
| Aspect ratio | 441:172 | 19.5:9 | Galaxy Z Fold 5 is taller |
| Visible height, portrait, with browser bars | ~786 px | ~736 px | +50 px for the Galaxy Z Fold 5 |
| Landscape width (CSS px) | 882 px | 832 px | +50 px for the Galaxy Z Fold 5 |
| Visible height, landscape | ~264 px | ~304 px | −40 px for the Galaxy Z Fold 5 |
| First released | 2023 | 2024 | 1 year apart |
| Engine in MobileCheck | Chromium (Chrome) | Chromium (Chrome) | same engine |
CSS px are the units media queries see. Visible heights subtract the status bar and the Chrome on Android bars as set in our device profiles; real bar heights vary with settings and scrolling. The release year is that of the first model with each screen.
What this means for your layout
How the width difference affects your layout
The Galaxy S24 Ultra is 40 CSS px wider (384 vs 344, 12% more). 2 common breakpoints fall between them: (min-width: 360px) (a common small-phone test width), (min-width: 375px) (a common small-phone test width) match the Galaxy S24 Ultra but not the Galaxy Z Fold 5, so a rule written for that width applies on only one of the two.
In a 2-column card grid with 16 px page padding and 16 px gaps, each card is 168 px wide on the Galaxy S24 Ultra and 148 px on the Galaxy Z Fold 5. Check that buttons, prices and long words still fit in the narrower one.
At 344 px the Galaxy Z Fold 5 is narrower than the 360 px many designs start from: fixed widths, wide tables and long unbroken words are the first things to cause sideways scrolling there.
Pixel density and image sizes
The Galaxy S24 Ultra has the denser screen: 2.813× against 2.625×. A full-width image (sizes="100vw") needs about 1080 px on the Galaxy S24 Ultra and 903 px on the Galaxy Z Fold 5 to look sharp.
With a srcset such as 640w, 828w, 1080w, 1290w, 1440w, 1640w, 2048w, the browser would normally pick the 1080w file on the Galaxy Z Fold 5 and the same one on the Galaxy S24 Ultra.
Both pixel ratios are fractional: one CSS pixel isn't a whole number of device pixels, so 1 px borders and hairlines can be rounded unevenly. Check thin lines on both rather than assuming they match.
How much fits above the fold
On first load about 786 px of the page is visible on the Galaxy Z Fold 5 and 736 px on the Galaxy S24 Ultra: 50 px less (7%) on the Galaxy S24 Ultra, roughly 2 lines of 16 px body text at a 1.5 line height.
If your main button sits just above the fold on the Galaxy Z Fold 5, it can end up below it on the Galaxy S24 Ultra. Keep the headline and the main action within the first 736 px, and size full-screen sections with 100svh rather than 100vh — see the 100vh problem on mobile.
Relative to its width, the Galaxy Z Fold 5 has the taller screen (441:172 vs 19.5:9), so the same content is laid out narrower but more of its length fits at once.
In landscape
Turned sideways, the Galaxy Z Fold 5 is 882 px wide and the Galaxy S24 Ultra 832 px; (min-width: 840px) matches only the Galaxy Z Fold 5 in landscape. The visible height drops to about 264 and 304 px, so a 64 px sticky header covers 24% and 21% of the screen — under the 25% at which MobileCheck flags fixed bars covering the page.
Same browser engine
Both run Android, so both render with Chromium, the engine behind Chrome. Engine quirks are the same; the differences above come from size and density alone. See how to test a website on Android.
More about these devices
- Galaxy Z Fold 5 viewport size
- Galaxy S24 Ultra viewport size — one screen for the Samsung Galaxy S24 / S25 Ultra / A15 / A54 / A55
Or open the free check with the Galaxy Z Fold 5 and the Galaxy S24 Ultra preselected: full-page screenshots in Chromium, with problems such as small text and crowded buttons highlighted.
Related comparisons
- iPhone 16 Pro vs Galaxy S24 Ultra — 402 vs 384 px wide, 3× vs 2.813×
- iPhone 16 Pro Max vs Galaxy S24 Ultra — 440 vs 384 px wide, 3× vs 2.813×
- iPhone 15 Pro Max vs Galaxy S24 Ultra — 430 vs 384 px wide, 3× vs 2.813×
- iPhone 14 vs Galaxy A54 — 390 vs 384 px wide, 3× vs 2.813×
- iPhone SE vs Galaxy A15 — 375 vs 384 px wide, 2× vs 2.813×
- Galaxy S24 vs Galaxy S24 Ultra — 360 vs 384 px wide, 3× vs 2.813×
Compare other devices → · All mobile viewport sizes →
Frequently asked questions
Is the Galaxy Z Fold 5 screen bigger than the Galaxy S24 Ultra?
In CSS pixels, which decide how much of a page fits, the Galaxy S24 Ultra is larger: 384 × 832 against 344 × 882. The Galaxy S24 Ultra has more physical pixels (1080 × 2340), which makes it sharper rather than roomier.
Do I need different CSS for the Galaxy Z Fold 5 and the Galaxy S24 Ultra?
Only if your breakpoints fall between 344 and 384 px: a min-width query at 360px or 375px applies to one and not the other. A fluid layout handles both without device-specific rules.
How much of a web page is visible on the Galaxy Z Fold 5 vs the Galaxy S24 Ultra?
About 344 × 786 CSS px on the Galaxy Z Fold 5 and 384 × 736 on the Galaxy S24 Ultra when a page first opens in portrait, after the status bar and Chrome on Android's bars. Bar heights are our device profiles' estimates.