Free screen checker
What Is My Screen Size?
Instantly discover your device's screen dimensions, resolution, and display specifications
More free tools
Viewport debugging, CSS units, rem/px math, and breakpoints—built for designers and front-end developers.
What is my viewport?
Live inner width and height, visualViewport, document size, scroll area, and safe-area insets.
Open toolMonitor size calculator
Discover your monitor's physical dimensions, model information, and detailed display specifications.
Open toolDevice pixel density calculator
Calculate your screen's pixel density (PPI) instantly.
Open toolAspect ratio generator
Calculate the aspect ratio of your screen or any width and height.
Open toolREM & EM to PX calculator
Convert rem, em, and px using a custom root font size for CSS layouts.
Open toolCSS viewport units (vh, dvh, svh)
See 100vh vs 100dvh vs 100svh vs 100lvh in pixels on this device.
Open toolResponsive breakpoint checker
Test a width against common CSS breakpoints (Tailwind-style and classic).
Open toolLooking for specs? Browse all devices or compare models.
Popular Devices
Explore screen specifications for the most popular smartphones, tablets, and laptops
Browse by Category
Find screen specifications for specific device categories
iPhone
Apple iPhone screen sizes and specifications
25 devicesiPad
Apple iPad screen sizes and specifications
11 devicesGalaxy S
Samsung Galaxy S series screen specifications
22 devicesPixel
Google Pixel phone screen specifications
16 devicesXiaomi
Xiaomi phone screen specifications
10 devicesPOCO
POCO phone screen specifications
11 devicesRedmi
Redmi phone screen specifications
20 devicesMacBook
Apple MacBook screen sizes and specifications
4 devicesiMac
Apple iMac screen sizes and specifications
6 devicesThinkPad
Lenovo ThinkPad screen sizes and specifications
22 devicesHow to Build a Responsive Site That Passes Screen Size Tests
A step-by-step audit for responsive sites: pick viewports with Compare Devices, test with DevTools and real devices, implement min-width/max-width/orientation media queries—extends UX without repeating best practices.
Viewport Width vs Screen Width vs DPR: Code Examples to Detect Each
Break down JS snippets for screen.width, window.innerWidth, and devicePixelRatio (DPR), with use cases for responsive images and canvas scaling—the code angle devs search for.
Best 27 Inch Monitor for Gaming: 6 Top Picks That Actually Deliver (2025)
Your gaming experience lives or dies by your monitor choice. The 27-inch sweet spot now delivers everything from budget mini-LED HDR under $300 to blazing 500Hz OLED panels that eliminate motion blur entirely—here's how to find your perfect match without wasting money on marketing hype.
Need to Compare Devices?
Compare screen sizes, resolutions, and specifications side-by-side to make informed decisions