Redmi Note 13 vs Galaxy A15: screen size and viewport
The Redmi Note 13 lays web pages out at 393 × 873 CSS px with a pixel ratio of 2.75; the Galaxy A15 at 384 × 832 with 2.813. The Redmi Note 13 is 9 px wider and 41 px taller.
The two screens side by side
Specs compared
| Spec | Redmi Note 13 | Galaxy A15 | Difference |
|---|---|---|---|
| Viewport, portrait (CSS px) | 393 × 873 | 384 × 832 | +9 px wide, +41 px tall |
| Device pixel ratio | 2.75 | 2.813 | −0.063 for the Redmi Note 13 |
| Physical resolution | 1081 × 2401 | 1080 × 2340 | Redmi Note 13: 3% more pixels |
| Aspect ratio | 20:9 | 19.5:9 | Redmi Note 13 is taller |
| Visible height, portrait, with browser bars | ~777 px | ~736 px | +41 px for the Redmi Note 13 |
| Landscape width (CSS px) | 873 px | 832 px | +41 px for the Redmi Note 13 |
| Visible height, landscape | ~313 px | ~304 px | +9 px for the Redmi Note 13 |
| First released | 2022 | 2024 | 2 years 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 Redmi Note 13 is 9 CSS px wider (393 vs 384, 2% more). One common breakpoint falls between them: (min-width: 390px) (a common phone test width) matches the Redmi Note 13 but not the Galaxy A15, 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 172 px wide on the Redmi Note 13 and 168 px on the Galaxy A15. Check that buttons, prices and long words still fit in the narrower one.
Pixel density and image sizes
The Galaxy A15 has the denser screen: 2.813× against 2.75×. A full-width image (sizes="100vw") needs about 1080 px on the Galaxy A15 and 1081 px on the Redmi Note 13 to look sharp — more on the Galaxy A15 even though its viewport is narrower.
With a srcset such as 640w, 828w, 1080w, 1290w, 1440w, 1640w, 2048w, the browser would normally pick the 1290w file on the Redmi Note 13 and the 1080w file on the Galaxy A15. Leave out the 1290w candidate and the Redmi Note 13 upscales a smaller file.
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 777 px of the page is visible on the Redmi Note 13 and 736 px on the Galaxy A15: 41 px less (6%) on the Galaxy A15, roughly 1 line of 16 px body text at a 1.5 line height.
If your main button sits just above the fold on the Redmi Note 13, it can end up below it on the Galaxy A15. 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 Redmi Note 13 has the taller screen (20:9 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 Redmi Note 13 is 873 px wide and the Galaxy A15 832 px; (min-width: 840px) matches only the Redmi Note 13 in landscape. The visible height drops to about 313 and 304 px, so a 64 px sticky header covers 20% 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
- Redmi Note 13 viewport size — one screen for the Xiaomi Redmi Note 11 / 12 / 13 / Xiaomi 13
- Galaxy A15 viewport size — one screen for the Samsung Galaxy S24 / S25 Ultra / A15 / A54 / A55
Or open the free check with the Redmi Note 13 and the Galaxy A15 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×
- Xiaomi 13 vs iPhone 15 — both 393 px wide, 873 vs 852 px tall
Compare other devices → · All mobile viewport sizes →
Frequently asked questions
Is the Redmi Note 13 screen bigger than the Galaxy A15?
In CSS pixels, which decide how much of a page fits, the Redmi Note 13 is larger: 393 × 873 against 384 × 832. The Redmi Note 13 has more physical pixels (1081 × 2401), which makes it sharper rather than roomier.
Do I need different CSS for the Redmi Note 13 and the Galaxy A15?
Only if your breakpoints fall between 384 and 393 px: a min-width query at 390px 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 Redmi Note 13 vs the Galaxy A15?
About 393 × 777 CSS px on the Redmi Note 13 and 384 × 736 on the Galaxy A15 when a page first opens in portrait, after the status bar and Chrome on Android's bars. Bar heights are our device profiles' estimates.