What is my screen resolution
Note: Physical resolution is estimated using device pixel ratio. Some browsers (like Brave) may adjust screen values for privacy protection. Learn how to measure monitor size correctly.
About This Tool
This free online screen resolution checker instantly detects your current display size using your browser. It shows your CSS screen resolution, viewport size, device pixel ratio (DPR), and an estimated physical resolution.
Operating system scaling, browser zoom, and privacy protection features may affect the values displayed.
What the Numbers Mean
When you check your screen resolution, your browser reports several values. These numbers help explain how your display size and scaling work.
| Value | Meaning |
|---|---|
screen.width / screen.height
|
Your Screen Resolution — the full logical screen size reported by your browser in CSS pixels. |
window.innerWidth / innerHeight
|
Viewport Size — the visible area inside your browser window (excluding toolbars and UI elements). |
devicePixelRatio
|
Device Pixel Ratio (DPR) — the scaling factor between CSS pixels and physical hardware pixels. |
physicalWidth / physicalHeight
|
Estimated physical monitor resolution calculated as CSS resolution × DPR. |
Note: Your reported screen resolution may differ between browsers due to zoom level, operating system scaling, or privacy protections (such as in Brave browser).
What Is My Screen Resolution?
Your screen resolution is the number of pixels displayed on your monitor, written as width × height. For example, a resolution of 1920 × 1080 means your screen shows 1,920 pixels across and 1,080 pixels down.
This tool instantly detects your current screen resolution using your browser. It shows your CSS screen size, viewport size, device pixel ratio (DPR), and an estimated physical monitor resolution.
CSS Screen Size vs Physical Resolution
Modern operating systems use display scaling to make text and apps easier to read. Because of this, your browser may report a different screen size than your monitor’s actual hardware resolution.
For example, if your laptop display is physically 1920 × 1080 but Windows scaling is set to 125%, your browser may report a CSS resolution of 1536 × 864.
The relationship looks like this:
Physical Resolution = CSS Resolution × Device Pixel Ratio
What Is Device Pixel Ratio (DPR)?
Device Pixel Ratio (DPR) is the scaling factor between CSS pixels and physical hardware pixels.
- DPR = 1 → No scaling (1 CSS pixel = 1 hardware pixel)
- DPR = 1.25 → 125% scaling
- DPR = 2 → Retina or high-density display
Higher DPR values are common on high-resolution laptops, MacBooks, and smartphones.
Why Does My Screen Resolution Look Different in Some Browsers?
You may notice that different browsers show slightly different values. This is normal and happens for several reasons:
- Browser zoom level
- Operating system scaling settings
- Multiple monitor setups
- Privacy protection (such as Brave’s fingerprinting protection)
Some privacy-focused browsers intentionally adjust reported screen dimensions to reduce tracking and fingerprinting.
How to Change Your Screen Resolution
If you want to adjust your monitor resolution, use your system display settings:
- Windows: Settings → System → Display → Display Resolution
- Mac: System Settings → Displays
- Linux: Settings → Displays
Always choose the recommended resolution for the best image clarity.
For more details, follow the provided guide:
Frequently Asked Questions
Is screen resolution the same as screen size?
No. Screen resolution refers to pixel dimensions (e.g., 1920 × 1080), while screen size refers to the physical diagonal measurement in inches.
Why is my resolution lower than my monitor’s advertised resolution?
This usually happens because of display scaling. Your operating system may scale the interface for readability.
Can websites detect my exact monitor size?
No. Browsers restrict access to exact hardware information for privacy reasons. Websites can only estimate physical resolution using device pixel ratio.
This tool is provided free by TechInterval.com
Operated by Tech Interval LLC
A registered USA company
Mailing Address:
1209 Mountain Road Pl NE, Ste R
Albuquerque, NM 87110
New Mexico, USA
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