What is My Screen Size?
Check your device's screen resolution, size, and display specifications in real-time
Screen Resolution
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Your device's actual screen resolution in pixels
Viewport Size
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Current visible area in your browser
Pixel Density (DPR)
1x
Device pixel ratio for high-DPI displays
Aspect Ratio
Width-to-height ratio of your screen
Physical Size
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Approximate CSS pixels after DPR scaling
Values update automatically when you resize or rotate your device
What is My Screen Size? The Complete Guide to Display Measurements
Understanding your screen size is crucial for everything from buying a monitor to designing websites. Whether you're a gamer looking for the perfect display, a designer creating responsive layouts, or just curious about your device's specifications, this guide will help you understand exactly what your screen measurements mean.
How to Check Your Screen Size and Resolution
Your screen size can be measured in two ways: physical dimensions (inches/centimeters) and pixel resolution. While our tool shows you the pixel resolution, you can calculate your physical screen size using these measurements and your device's pixel density (DPR). Most modern laptops come in sizes between 13" and 17", while desktop monitors typically range from 21" to 32" or larger.
Understanding Screen Resolution
Screen resolution defines how many pixels your display can show. Common resolutions include:
- HD (1280×720) - Entry-level displays
- Full HD (1920×1080) - Most popular resolution for gaming and everyday use
- 2K/QHD (2560×1440) - Higher-end gaming monitors and professional displays
- 4K/UHD (3840×2160) - Premium displays for content creation and high-end gaming
- 5K and above - Professional video editing and specialized work
Viewport Size vs. Screen Resolution: Why Both Matter
While your screen resolution remains fixed, your viewport size changes as you resize your browser window. This distinction is crucial for:
- Web developers testing responsive designs
- UI designers ensuring consistent layouts
- Content creators optimizing media for different devices
- App developers building adaptive interfaces
Display Quality and Pixel Density (DPR)
Device Pixel Ratio (DPR) measures your screen's pixel density. A higher DPR means sharper images and clearer text:
- 1x DPR - Standard density displays (older monitors)
- 2x DPR - Retina displays (Most iPhones, MacBooks)
- 3x DPR - Super Retina displays (High-end smartphones)
- 4x DPR and above - Ultra-high-density displays
Aspect Ratios and Their Uses
Different aspect ratios serve different purposes:
- 16:9 - Standard widescreen format, ideal for video content and gaming
- 16:10 - Popular for productivity, offering extra vertical space
- 21:9 - Ultrawide format, perfect for immersive gaming and multitasking
- 19.5:9 / 20:9 - Modern smartphone ratios for better one-handed use
- 3:2 - Found in Surface devices, balanced for both content creation and consumption
Choosing the Right Screen Size
Consider these factors when selecting a display:
- Viewing distance - Larger screens need greater viewing distances
- Usage purpose - Gaming, work, or entertainment have different optimal sizes
- Available space - Consider your desk or mounting location
- Resolution needs - Higher resolutions are better for detailed work
Pro Tip: For optimal viewing, the distance between you and your screen should be approximately 1.5 to 2.5 times the screen's diagonal size. Use our screen size calculator above to find your perfect setup.