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Device screen reference

Samsung Galaxy A55 screen size

Use this reference for Samsung Galaxy A55 CSS viewport width, physical resolution, DPR, diagonal size, PPI, and responsive testing notes.

Samsung Galaxy A55 viewport details

BrandSamsung
FamilyAndroid
TypePhone
CSS viewport360 × 780
Physical resolution1080 × 2340
Device pixel ratio3
Diagonal6.6 inches
Pixel density390 PPI
Aspect ratio19.5:9
Source labelManufacturer specs + Android viewport reference
ConfidenceReview
Testing note: Mainstream Samsung Android reference with narrow CSS width. Browser zoom, OS display scaling, address bars, toolbars, and orientation can change what JavaScript reports on a live webpage.

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Responsive testing notes

How to use this viewport reference

Use 360 × 780 as a practical starting point for testing Samsung Galaxy A55 layouts, then confirm the live viewport in the browser you are targeting.

Test CSS width

Start breakpoint checks around 360px, then resize slightly above and below that value.

Record DPR

A DPR of 3 affects image sharpness, canvas rendering, and screenshot interpretation.

Verify live values

Use the live checker because browser chrome, orientation, zoom, and OS scaling can change the usable area.

Source and update note

Reference values, not guarantees

This page is built from the ScreenMetricLab device viewport dataset. Values are normalized for practical QA and design use, but they should be verified on real devices or browser emulators before publishing critical layouts.

Record source: Physical display data should be verified against Samsung specs; CSS viewport can vary by display size setting.

Updated 2026-06-26

Device references should be reviewed regularly as browsers, OS scaling, and hardware options change.

Use with live tools

Pair this page with the viewport checker, DPR checker, and screen resolution checker for better QA notes.

Frequently asked questions

What is the CSS viewport size for Samsung Galaxy A55?

The reference CSS viewport for Samsung Galaxy A55 is 360 × 780. Live browser values can still change because of zoom, browser UI, OS display scaling, orientation, and responsive mode.

Is viewport size the same as screen resolution?

No. The physical resolution for this device is 1080 × 2340, while the CSS viewport is the layout area that websites normally use for responsive breakpoints.

Which value should I use for responsive testing?

Use the CSS viewport width first when checking breakpoints and layout bugs. Include DPR and physical resolution as extra context in QA reports.

Why can my live result be different from this reference?

Browser chrome, zoom, operating-system scaling, accessibility settings, split view, and orientation can all change the viewport reported by JavaScript.

Related tools

Use these tools to validate this device reference in a live browser.

What Is My Screen Size?

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Viewport Size Checker

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Screen Resolution Checker

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DPR Checker

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PPI Calculator

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