Samsung · Galaxy S
Galaxy S21 Screen Size
The Galaxy S21 features a 6.2 inches Dynamic AMOLED 2X display with a resolution of 2400 × 1080 (2400 × 1080 pixels), delivering 421 PPI pixel density. Released in 2021, this phone offers 120Hz LTPO refresh rate and peak brightness of 1300 nits peak.
Actual Size
Device outline scaled to relative proportions using physical dimensions.
71.2 × 151.7 mm
Display DNA
A fingerprint of the Galaxy S21's display characteristics — screen size, panel type, refresh rate, pixel density, and brightness combined into a unique profile.
6 of 7 display traits active
Similar screen size
Computed Display Data
Derived measurements calculated from the Galaxy S21's physical dimensions and resolution — unique values not found on standard spec sheets.
Display Rankings
Where this device ranks among all phones in our database.
How Big Is 6.2 inches?
The Galaxy S21's 6.2" screen compared to everyday objects by diagonal length.
Galaxy S21 Screen Resolution & Display Specifications
The Galaxy S21's screen measures 6.2 inches (15.7cm) diagonally, with physical dimensions of 2.80 inches (71.2mm) wide by 5.97 inches (151.7mm) tall. The Dynamic AMOLED 2X panel technology ensures vibrant colors with 24-bit color depth and a 20:9 aspect ratio, making it ideal for mobile content consumption and photography.
With its 120Hz LTPO display, the Galaxy S21 provides exceptionally smooth scrolling and responsive touch interactions. This high refresh rate technology is particularly beneficial for gaming, video playback, and everyday scrolling.
Screen Size | 6.2 inches |
Resolution | 2400 × 1080 |
Pixel Density | 421 PPI |
Display Type | Dynamic AMOLED 2X |
Aspect Ratio | 20:9 |
Color Depth | 24-bit |
Refresh Rate | 120Hz LTPO |
Brightness | 1300 nits peak |
Galaxy S21 Screen Dimensions
At 421 PPI, the Galaxy S21 delivers sharp, crisp text and images. The total pixel count of 2,592,000 pixels (2400 × 1080) ensures high-definition content rendering. This resolution is ideal for Full HD+ content and everyday use.
For mobile users, the 6.2 inches screen size strikes a balance between portability and usability. The 20:9 aspect ratio is optimized for modern app interfaces and video content.
Width | 2.80 inches (71.2mm) |
Height | 5.97 inches (151.7mm) |
Diagonal | 6.2 inches (15.7cm) |
Total Pixels | 2,592,000 |
More devices to compare
The Galaxy S21 sits in Samsung's Galaxy S lineup — here are nearby picks from our database.
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Approximate CSS viewport dimensions for responsive development. Values are derived from native resolution and estimated device pixel ratio.
360 × 800@media (max-width: 360px)max-w-[360px]Frequently asked questions
- Is the Galaxy S21 bigger than the Galaxy S20?
- The Galaxy S21 has the same screen size as the Galaxy S20.
- Which phones have the same screen size as the Galaxy S21?
- Devices with a similar 6.2 inches display include Xiaomi 12, Pixel 8, iPhone 17.
- Is 421 PPI noticeable on the Galaxy S21?
- The Galaxy S21's pixel density is lower than average (421 PPI vs ~500 PPI median) for Galaxy S devices. Above 400 PPI, individual pixels are difficult to discern at normal viewing distance.
- Can I use the Galaxy S21 one-handed?
- With a body width of 71.2 mm, the Galaxy S21 rates 4/5 for one-handed use (Good). Phones under 72 mm wide are generally comfortable for one-handed operation.
- How does the Galaxy S21 compare to the Xiaomi 12?
- Both have similar screen sizes (6.2 inches vs 6.28 inches). The Galaxy S21 offers 2400 × 1080 at 421 PPI, while the Xiaomi 12 has 2400 × 1080 at 419 PPI.
Keep exploring
Tools and guides for screen size, pixel density, and display specs.
Tools
- Viewport CheckerLive CSS viewport and safe-area values
- DPR CheckerRead device pixel ratio live
- Breakpoint CheckerTest width against Tailwind tiers
- Media Query GeneratorGenerate @media CSS snippets
- Monitor Size CalculatorFind physical monitor dimensions
- Pixel Density CalculatorCalculate screen PPI
- Aspect Ratio GeneratorConvert aspect ratios