Samsung Galaxy S25 viewport size
360 × 780CSS px · 3× DPR · 1080×2340 physical
The Samsung Galaxy S25 gives web pages a 360 × 780 CSS pixel viewport in portrait. That’s the width your layout and media queries actually see, not the 1080 × 2340 physical pixels of the screen: with a device pixel ratio of 3, every CSS pixel is 3 × 3 real pixels.
See your site on a Samsung Galaxy S25
Paste your address (or localhost:3000). doesitfit shows it at exactly 360 × 780, with Chrome (Android)’s bars if you want them, and tells you if anything spills.
Free, no sign-up. Or ask Claude, ChatGPT or Codex to check it.
What a web page actually sees
The full viewport is 360 × 780, but the browser’s own bars take some of it. In Chrome (Android) a page gets about 360 × 660 on first load (40px status bar, 56px Chrome toolbar and 24px gesture bar on first load). That’s your real “above the fold”. Use 100dvh instead of 100vh for full-height sections, or they’ll hide behind the toolbar (why).
| Setting | Width | Height |
|---|---|---|
| Full viewport (portrait) | 360px | 780px |
| Visible on first load (Chrome (Android)) | 360px | 660px |
| Landscape (full) | 780px | 360px |
What it means for your CSS
Breakpoints
At 360px: Tailwind uses base styles only (below sm, 640px); Bootstrap uses xs. In landscape (780px): Tailwind uses md (sm: md: styles apply), Bootstrap md.
Content width
With 16px of padding on each side your text column is 328px; with 24px it’s 312px. Text closer than 8px to the edge looks cramped (more).
Sharp images
A full-width image needs about 1080px of real pixels (360 × 3).
<img src="hero-1080.jpg" srcset="hero-800.jpg 800w, hero-1080.jpg 1080w" sizes="100vw" alt="…">
Styles for this width
Content-first breakpoints beat device lists, but if something breaks at this width:
@media (max-width: 360px) {
/* screens 360px wide and narrower */
}Other display size settings
Many people change the “Display size” setting, which changes the viewport your site gets:
How common is 360 × 780?
360 × 780 is the #6 most common phone screen size worldwide, with 3.17% of mobile traffic (Aug 2026, StatCounter).
Same viewport:
Compare:
- iPhone 17 Pro vs Samsung Galaxy S25
- Samsung Galaxy S25 vs Samsung Galaxy S25 Ultra
- Samsung Galaxy S24 vs Samsung Galaxy S25
- Samsung Galaxy S25 vs Samsung Galaxy S26
- Samsung Galaxy A56 / A36 vs Samsung Galaxy S25
Everything about the 360 × 780 viewport · All devices 360px wide · All Samsung Galaxy sizes
Questions people ask
What is the viewport size of the Samsung Galaxy S25?
360 × 780 CSS pixels in portrait (780 × 360 in landscape), with a device pixel ratio of 3. The screen itself is 1080 × 2340 physical pixels.
How much of the Samsung Galaxy S25 screen does a web page get in Chrome?
About 360 × 660 on first load: the 40px status bar, 56px Chrome toolbar and 24px gesture bar on first load. Design your first screen for that height, not the full 780px.
Which CSS breakpoint does the Samsung Galaxy S25 fall into?
At 360px wide, Tailwind CSS uses base styles only (below sm, 640px) and Bootstrap uses its xs tier. In landscape (780px) Tailwind uses md (sm: md: styles apply).
How wide should images be for the Samsung Galaxy S25?
A full-width image needs about 1080px of real pixels (360 CSS px × DPR 3) to look sharp. Use srcset so smaller screens don’t download it.
How can I test my website on a Samsung Galaxy S25 without one?
Open doesitfit.lol, paste your address (localhost works too) and pick the Samsung Galaxy S25. It shows your site at exactly 360 × 780 CSS pixels and flags anything that spills past the edge.
Guides that help
- 100vh on mobile is broken: use dvh, svh and lvh100vh hides your content behind Safari and Chrome toolbars on phones. Here's why, with real iPhone and Android numbers, and how dvh, svh and lvh fix it.Fixes · 8 min read
- How to fix horizontal scrolling on mobile (12 causes)Page wobbles sideways on phones? The 12 usual causes of horizontal scrolling on mobile, a fix for each, and a console snippet that finds the culprit fast.Fixes · 9 min read
- What is a viewport? CSS pixels vs screen resolutionA viewport is the area your page is laid out in, measured in CSS pixels, not screen pixels. See real numbers from iPhones and MacBooks, then check yours.Guides · 8 min read
About these numbers
Confidence: Good: from official specs and reports. Samsung phones default to a 384px-wide layout on Plus/Ultra/FE/A-series and 360px on the base S-series; about a third of users change "Display size", so those settings are selectable in the toolbar. Android Chrome rounds the CSS size up (ceil of pixels ÷ DPR). Samsung tablet DPRs are disputed between sources; treat them as likely rather than confirmed.
Sources include DeviceAtlas, Chrome DevTools device list (EmulatedDevices.ts), iosref.com, ios-resolution.com. Researched September 2026.