Live Hardware Diagnostics Desktop / Laptop

🖥️ Physical Hardware Resolution • 16:9

1920 × 1080

pixels

Full HD 1080p 2,073,600 total pixels (2.07 MP)

Display Scaling

1.0x

100% Native Scaling

Browser Viewport

1920 × 940

Current inner window size

Usable Desktop availWidth

1920 × 1040

Screen excluding OS taskbars

Color Palette Depth

24-bit

16.7M Colors (sRGB)

Dynamic Range Media API

SDR

Standard Dynamic Range

💳 Physical Screen Size & PPI Estimator (Card Calibration)

Match the on-screen card width with any physical credit card, ID, or driver's license (standard 85.6 mm / 3.37 inches).

Estimated Screen Diagonal --.-"

Physical Pixel Density --- PPI

Physical Dimensions --.-" × --.-"

CHIP

Calibration Card

•••• •••• •••• 3370

85.60 mm × 53.98 mm (Standard ID-1)

VALID THRU: 12/30 SCREEN CALIBRATION

◀ Smaller Hold your physical card against the screen to align ↕ Larger ▶

Or snap to:

📊 Standard Screen Resolutions Reference Table

Popular display standards across monitors, laptops, and smartphones

Aspect Ratio Calculator →

Standard Name	Resolution (W × H)	Aspect Ratio	Total Megapixels	Common Devices
4K Ultra HD (2160p)	3840 × 2160	16:9	8.29 MP	Smart TVs, 27"–32" Pro Monitors
UWQHD (Ultrawide)	3440 × 1440	21:9	4.95 MP	34" Curved Gaming Displays
2K / QHD (1440p)	2560 × 1440	16:9	3.69 MP	27" Esports & Productivity Monitors
Full HD (1080p)	1920 × 1080	16:9	2.07 MP	Most Popular Global Standard (60%+ Web)
WUXGA (16:10)	1920 × 1200	16:10	2.30 MP	Modern Dell XPS & ThinkPad Laptops
HD+ (900p)	1600 × 900	16:9	1.44 MP	Legacy Laptops & 20" Monitors
HD (720p)	1280 × 720	16:9	0.92 MP	Video Conferencing, Mobile Streams

How Does Display Resolution Testing Work in Modern Browsers?

When you connect a monitor or open a laptop, modern operating systems decouple hardware pixels from logical desktop pixels using scaling factors. This ensures that high-resolution screens (like 4K monitors or Apple Retina displays) display crisp, readable UI text rather than microscopic icons.

📐 Physical Pixels vs Logical CSS Pixels

The physical hardware resolution is calculated via screen.width × window.devicePixelRatio. For example, if a Windows laptop screen reports 1536 × 864 in CSS but runs at 1.25x (125%) scaling, its true physical panel resolution is 1920 × 1080 (Full HD 1080p).

🎯 The Role of Pixel Density (PPI)

Screen size and resolution together define sharpness. A 24-inch 1080p monitor has ~92 PPI, while a 15.6-inch 1080p laptop has ~141 PPI. Mobile phones and Apple Retina displays often exceed 300 to 450 PPI for print-like visual clarity.

🛡️ 100% Client-Side • Instant & Auto-Saved Locally

What Is My Screen Resolution? — Check Display Resolution, Size & PPI

🎯 Benchmarks

Instantly detect your true physical screen resolution, live viewport size, display scaling (DPR), HDR support, and calibrate physical screen size and PPI.

⭐ 4.8/5 (171 votes)

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Frequently Asked Questions

Quick answers about controls, features, accuracy, and local browser saving.

What is the fundamental difference between Screen Resolution and Screen Size?

Screen Resolution refers to the total count of individual physical pixels displayed horizontally and vertically (e.g., 1920 × 1080 pixels). Screen Size measures the physical diagonal distance of the display glass from corner to corner in inches (e.g., a 15.6" laptop or a 27" desktop monitor). Two displays can have the exact same 1080p resolution while being completely different physical sizes.

Why does my browser resolution look smaller than my monitor specs?

This is caused by Device Pixel Ratio (DPR) or OS Display Scaling. Operating systems like Windows (often set to 125% or 150% scaling on laptops) and macOS (Retina 200% scaling) scale the user interface up so text and icons remain readable rather than tiny. While your CSS browser viewport might report 1280 × 720 or 1536 × 864, your hardware panel is physically rendering at 1920 × 1080 or 2560 × 1440 using a pixel multiplier.

What is PPI (Pixels Per Inch) and how is it calculated?

PPI (Pixels Per Inch) measures display pixel density—how tightly packed pixels are across each physical inch. The formula is: PPI = √(Width_px² + Height_px²) / Diagonal_inches. Higher PPI values (such as 220+ PPI on Apple Retina or 4K monitors) produce crisp, razor-sharp typography where individual pixels are indistinguishable to the human eye.

How does the Credit Card Screen Calibration work?

Because web browsers do not have operating system permissions to query the physical millimeter tape-measure size of an external monitor, we use an international standard object for calibration. All credit cards, debit cards, and driver's licenses worldwide follow the ISO/IEC 7810 ID-1 standard (width is exactly 85.60 mm or 3.37 inches). By matching the on-screen card width to your physical card, our calculator derives your exact CSS pixel ratio per inch.

Is my hardware or resolution data sent to any server?

No. RapidWebApp runs 100% locally inside your web browser. All diagnostic measurements use standard browser APIs (window.screen, window.devicePixelRatio, window.matchMedia) with zero cloud transmission, zero cookies, and zero tracking.

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