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What Is My Screen Size? Resolution, Diagonal & PPI

Discover your exact display specs: find out “what is my screen size” (diagonal in inches/cm) and “what is my screen resolution” (physical pixel count). Real-time, private, and accurate.

Screen Resolution
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Physical pixels (answers: what is my screen resolution)
Viewport Size
—
Available area
Pixel Ratio
—
Device DPR
💡 Quick answer: Your screen size (diagonal) is shown in the “Screen Diagonal” card below. Your screen resolution is the top “Screen Resolution” stat. Both keywords: “what is my screen size” and “what is my screen resolution” are instantly displayed.

📐 What Is My Screen Size? & Full Display Metrics

📺
Device Resolution
—
The full physical pixel count → answers “what is my screen resolution”.
🪟
Inner Resolution
—
Usable browser window area (CSS pixels).
🔬
Device Pixel Ratio
—
Physical vs CSS pixels. 2× = Retina/HiDPI.
📏
Display Dimensions
—
Estimated physical width × height.
📐
📏 Screen Diagonal (What Is My Screen Size)
—
Your actual screen size in inches & cm – the direct answer to “what is my screen size”.
🎨
Color Depth
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Bits per pixel. 24-bit = 16.7M colors, 30-bit = HDR.
🟣
Pixel Depth
—
Frame buffer bits per pixel.
⚖️
Aspect Ratio
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Width:Height ratio. 16:9, 16:10, etc.
🏷️
Resolution Type
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HD, Full HD, 4K, QHD, 5K classification.
🌐
Browser Viewport
—
Outer browser size including UI.
📱
Orientation
—
Portrait/Landscape + angle.
🖥️
PPI (est.)
—
Pixels per inch – display sharpness indicator.

🔗 Related Tools

🖥️
Check Monitor Size
Measure physical screen
↗ 🌐
Check IP Address
Find your public IP & location
↗ 🪟
Windows Resolution Guide
Change display settings in Windows
↗ 🍎
macOS Resolution Guide
Adjust display settings on Mac
↗

❓ Frequently Asked Questions

What is my screen size?
Your screen size (diagonal) is automatically estimated above in the "Screen Diagonal" card. That is the direct answer to “what is my screen size”.
What is my screen resolution?
Your current screen resolution appears in the top blue stat bar: “Screen Resolution” and also the “Device Resolution” card.
How accurate is the diagonal estimation?
It uses CSS standard (1 inch = 96px) combined with device pixel ratio. For most modern devices it's very accurate.
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