Skip to content
ScreenMetricLab Check screen

Device screen reference

Samsung Galaxy S23 Ultra screen size

Use this reference for Samsung Galaxy S23 Ultra CSS viewport width, physical resolution, DPR, diagonal size, PPI, and responsive testing notes.

Samsung Galaxy S23 Ultra viewport details

BrandSamsung
FamilyAndroid
TypePhone
CSS viewport480 × 1067
Physical resolution1440 × 3088
Device pixel ratio3
Diagonal6.8 inches
Pixel density500 PPI
Aspect ratio19.3:9
Source labelManufacturer specs + Samsung viewport reference
ConfidenceReview
Testing note: Large Samsung reference; display mode and font/display size can affect viewport. Browser zoom, OS display scaling, address bars, toolbars, and orientation can change what JavaScript reports on a live webpage.

Visual comparison

Compare viewport shapes

Pick two records and compare CSS viewport or physical resolution shapes. The drawing is scaled for relative size, so it is useful for layout intuition before opening the detailed records.

Left device
Right device

CSS viewport comparison

Compare two devices to see the relative area.

—

Device

Family · DPR · PPI

—

Device

Family · DPR · PPI

Responsive testing notes

How to use this viewport reference

Use 480 × 1067 as a practical starting point for testing Samsung Galaxy S23 Ultra layouts, then confirm the live viewport in the browser you are targeting.

Test CSS width

Start breakpoint checks around 480px, 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 is a practical reference.

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 S23 Ultra?

The reference CSS viewport for Samsung Galaxy S23 Ultra is 480 × 1067. 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 1440 × 3088, 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?

Active

Check your live screen resolution, viewport size, DPR, browser, OS, orientation, color depth, and refresh rate.

Open screen checker →

Viewport Size Checker

Active

Measure the browser viewport and visual viewport that your website can use right now.

Check viewport →

Screen Resolution Checker

Active

Find the physical pixel grid reported by your current display and copy it for QA notes.

Check resolution →

DPR Checker

Active

See your device pixel ratio for responsive images, retina assets, and layout debugging.

Check DPR →

PPI Calculator

Active

Calculate pixel density from resolution and diagonal display size for phones, laptops, monitors, and TVs.

Calculate PPI →
View all related tools →

Related devices

More Android references

View family page →

Google Pixel 8

412 × 915 CSS viewport · DPR 2.625

Google Pixel 8 Pro

448 × 998 CSS viewport · DPR 3

Google Pixel 8a

412 × 915 CSS viewport · DPR 2.625