What is the standard aspect ratio for mobile stories and reels?

Mobile vertical video platforms (Instagram Reels, TikTok, YouTube Shorts) use a 9:16 vertical aspect ratio (typically 1080x1920).

Yes. All math executes locally in your browser.

Does Screen Resolution & Aspect Ratio Calculator work offline without an internet connection?

Yes. Once the Screen Resolution & Aspect Ratio Calculator application bundle is loaded into your browser, all computational logic, file processing, and transformations execute 100% locally on your device without making background network requests.

What are the privacy guarantees when using Screen Resolution & Aspect Ratio Calculator?

Shadow Toolkit is built on an absolute zero-server-upload architecture. Your raw input files, text strings, and calculations are kept strictly inside your browser's private memory sandbox and are automatically cleared when you close or refresh the tab.

Screen Resolution & Aspect Ratio Calculator

Calculate screen resolution, aspect ratio, megapixels, and PPI.

100% In-Browser

100% In-Browser PrivacyLocal

Your files and data are processed locally and never leave your device.

Quick Resolution PresetsClick any standard to populate

Resolution & Megapixels Analyzer

Inspect aspect ratios, total pixel count, and uncompressed memory footprint.

Width (Pixels)

Height (Pixels)

Visual Aspect Proportion (16:9 (Widescreen))

3840 × 2160

Megapixels (MP)

8.29 MP

Total Pixels

8,294,400

Aspect Ratio

16:9 (Widescreen)

Decimal Ratio

1.78:1

Uncompressed Memory Footprint per Frame

24-Bit RGB (8 bpc)23.73 MBStandard web/camera image

32-Bit RGBA (8 bpc + Alpha)31.64 MBTransparent Canvas / GPU texture

64-Bit HDR (16 bpc Float)63.28 MBHigh dynamic range / Video frame

What is Screen Resolution & Aspect Ratio Calculator?

Screen Resolution & Aspect Ratio Calculator calculates simplified aspect ratios (e.g., 16:9, 4:3, 21:9, 1:1, 9:16) from pixel dimensions and rescales resolutions while preserving proportional framing.

Zero-Server Client-Side Guarantee

Unlike legacy online utilities that upload sensitive media and documents to remote cloud storage, Shadow Toolkit executes this entire operation directly within your browser's local runtime. Your raw data never crosses the network.

Key Capabilities

Calculates simplified aspect ratios using the Greatest Common Divisor (GCD) algorithm
Rescales dimensions proportionally: enter new width to calculate matching height
Standard resolution presets: 1080p (FHD), 1440p (2K), 2160p (4K UHD), 4320p (8K), Ultrawide
Visual proportion box comparing aspect ratios against standard 16:9
100% private in-browser tool