Aspect Ratio Calculator
Appliance Location: The Measuring Cups Proportions📐 Calculate Aspect Ratio from Dimensions
×
16 : 9
Simplified Aspect Ratio
GCD:120
Decimal:1.7778
📏 Scale Dimensions Maintaining Ratio
→
720 px
→
1280 px
🎬 Common Aspect Ratios & Use Cases
| Aspect Ratio | Common Resolution | Typical Use |
|---|---|---|
| 1:1 | 1080×1080 | Instagram posts, profile pictures |
| 4:3 | 1024×768 | Old monitors, iPad, photography |
| 3:2 | 1920×1280 | 35mm film, photography |
| 16:9 | 1920×1080 | HD video, YouTube, modern monitors |
| 16:10 | 1920×1200 | Widescreen monitors |
| 21:9 | 2560×1080 | Ultrawide monitors, cinematic |
| 9:16 | 1080×1920 | Instagram Stories, TikTok, Reels |
| 2:1 | 2160×1080 | Some Android phones |
📱 Aspect Ratio by Platform Reference
| Platform | Recommended Ratio | Recommended Size | Content Type |
|---|---|---|---|
| Instagram Feed | 1:1 or 4:5 | 1080×1080 or 1080×1350 | Photos |
| Instagram Stories | 9:16 | 1080×1920 | Vertical stories |
| YouTube Videos | 16:9 | 1920×1080 (HD) | Standard video |
| YouTube Shorts | 9:16 | 1080×1920 | Vertical short videos |
| TikTok | 9:16 | 1080×1920 | Vertical videos |
| Facebook Feed | 1.91:1 to 4:5 | 1200×630 to 1080×1350 | Images & videos |
| Twitter/X | 16:9 | 1600×900 | Image posts |
| 1.91:1 | 1200×627 | Shared images |
📺 Common Video Resolutions
| Resolution | Dimensions | Aspect Ratio | Common Name |
|---|---|---|---|
| 480p | 854×480 | 16:9 | SD |
| 720p | 1280×720 | 16:9 | HD |
| 1080p | 1920×1080 | 16:9 | Full HD |
| 1440p | 2560×1440 | 16:9 | 2K / QHD |
| 4K | 3840×2160 | 16:9 | UHD |
| 8K | 7680×4320 | 16:9 | 8K UHD |
💡 What is Aspect Ratio? Aspect ratio is the proportional relationship between width and height. It's expressed as two numbers separated by a colon (e.g., 16:9). Maintaining aspect ratio prevents image distortion when resizing.
How to Use the Aspect Ratio Calculator
Calculating aspect ratios and scaling dimensions is simple with our tool:
- Calculate from Dimensions: Enter width and height values to find the simplified aspect ratio.
- Scale to Target: Enter a target width or height to calculate the matching dimension while preserving ratio.
- Use Presets: Click preset buttons (16:9, 4:3, 1:1, etc.) to quickly set common ratios.
- Reference Tables: Check common ratios and resolutions for video, photography, and social media.
💡 Pro Tip: Use 16:9 for YouTube and modern videos, 9:16 for TikTok/Instagram Stories, and 1:1 for Instagram feed posts. Always maintain aspect ratio to avoid stretched or squashed images.
Frequently Asked Questions
What is aspect ratio?
Aspect ratio is the proportional relationship between width and height of an image, video, or screen. It's written as width:height (e.g., 16:9 means width is 16 units for every 9 units of height).
How do I find the aspect ratio of my image?
Divide the width and height by their Greatest Common Divisor (GCD). For example, 1920×1080: GCD is 120 → 1920÷120=16, 1080÷120=9 → 16:9 aspect ratio.
What is the difference between 16:9 and 4:3?
16:9 is widescreen (modern TVs, monitors, YouTube). 4:3 is more square (old TVs, iPad, some photo prints). 16:9 is 78% wider than 4:3 at the same height.
Is this tool free to use?
Yes, completely free with no usage limits. Calculate as many aspect ratios as you need for your projects.
