Aspect Ratio Calculator — Visual

Free, private, serverless aspect ratio calculator with visual preview. Calculate aspect ratios from pixel dimensions, use common presets (16:9, 4:3, 1:1, 9:16), resize with locked ratio, and view pixel count and megapixel stats. With visual proportion preview. No data leaves your browser — 100% client-side.

🔒 100% Private

⚡ Completely Free

🌐 Runs in Browser

📦 Export Ready

⚡

Aspect Ratio Calculator — Visual

Tool Workspace

Ready

Loading tool...

Enter the width and height in pixels.
See the aspect ratio calculated instantly (e.g., 16:9).
Use preset buttons for common ratios (16:9, 4:3, 21:9, 1:1, 9:16, 3:2).
Use the resize calculator — enter a new width or height and the other dimension auto-calculates to maintain the ratio.
View a visual preview of the proportions.
Check stats: total pixels, megapixels, and orientation.

Aspect Ratio Calculator

Calculate aspect ratios for images and videos. 8 common presets, proportional resizing, and visual preview.

Features

8 common presets
GCD ratio calculation
Proportional resize
Visual preview

Privacy

100% client-side.

Frequently Asked Questions

How is the aspect ratio calculated?

The tool divides width and height by their greatest common divisor (GCD) to find the simplest ratio. For example, 1920×1080 simplifies to 16:9.

What presets are available?

Common presets include 16:9 (widescreen), 4:3 (classic TV/monitor), 21:9 (ultrawide), 1:1 (square, Instagram), 9:16 (vertical video), and 3:2 (DSLR photos).

What are the use cases?

Resizing images while maintaining proportions, planning video dimensions, designing responsive layouts, calculating print dimensions, and preparing social media graphics with correct ratios.

Can I resize while keeping the ratio?

Yes. The resize calculator lets you enter a new width or height, and the tool automatically calculates the other dimension to preserve the exact aspect ratio.