AR
Aspect Ratio Calculator
Calculate and convert aspect ratios for images, videos, and screens
Aspect Ratio16:9
1920 x 1080
1920 x 1080px · 16:9
Common Aspect Ratios Reference
| Ratio | Decimal | Common Use |
|---|---|---|
| 16:9 | 1.778 | Widescreen TV, YouTube, monitors |
| 4:3 | 1.333 | Classic TV, iPad, presentations |
| 1:1 | 1.000 | Instagram square, profile pictures |
| 21:9 | 2.333 | Ultrawide monitors, cinema |
| 9:16 | 0.563 | Phone vertical, TikTok, Reels |
| 3:2 | 1.500 | 35mm photography, MacBook |
| 2:3 | 0.667 | Portrait photography, posters |
What is Aspect Ratio Calculator?
Calculate aspect ratios and resize dimensions while maintaining proportions. Enter any width and height to find the aspect ratio, or lock the ratio and calculate the missing dimension. Includes presets for common ratios like 16:9, 4:3, 1:1, 21:9, and phone screen sizes. Essential for web developers, video editors, photographers, and designers working with responsive layouts.
How to Use Aspect Ratio Calculator
- 1Enter the width and height of your image or video
- 2See the calculated aspect ratio displayed automatically
- 3Use the ratio lock to calculate new dimensions while preserving the ratio
- 4Select a preset ratio or enter custom values
Frequently Asked Questions
An aspect ratio is the proportional relationship between the width and height of an image, video, or screen. It is expressed as two numbers separated by a colon (e.g., 16:9). A 16:9 ratio means the width is 16 units for every 9 units of height.
Common aspect ratios include: 16:9 (widescreen TV, YouTube), 4:3 (classic TV, iPad), 1:1 (Instagram square), 9:16 (phone vertical/TikTok), 21:9 (ultrawide monitors), and 3:2 (35mm photography).
Enter the original width and height, then change either the new width or new height. The tool will automatically calculate the other dimension to maintain the same aspect ratio, preventing distortion.
Related Tools
B64
Base64 Encoder/Decoder
Encode text to Base64 or decode Base64 strings instantly
🎨
Color Converter
Convert colors between HEX, RGB, HSL formats with live preview
PDF
PDF Merge & Split
Merge multiple PDFs into one or split a PDF into separate pages
CSV
JSON to CSV Converter
Convert JSON arrays to CSV format for spreadsheets and databases