Aspect Ratio CalculatorAuto-Scaling
Calculate exact aspect ratios from resolutions and auto-scale width or height with locked ratio calculations.
Preset Aspect Ratios:
Standard Resolutions:
Resolution & Ratio Controls
Width (W)
px
Height (H)
px
Interactive Width Scaling1920 px
Calculated Aspect Ratio
Simplified Ratio16:9
Decimal Ratio1.7778:1
Total Pixels2,073,600 px(2.07 MP)
Standard Format MatchFull HD (1080p)
Proportional Visual Preview1920 × 1080 px
16:91920 × 1080
FAQ
Frequently Asked Questions
Everything you need to know about this tool
The aspect ratio is calculated by dividing both the width and height by their Greatest Common Divisor (GCD). For example, 1920 and 1080 have a GCD of 120, giving (1920 ÷ 120) : (1080 ÷ 120) = 16:9.
Social Media & Video Platform Guidelines
YouTube Video16:9 • 1920×1080Standard horizontal widescreen HD/4K videos
TikTok & Shorts9:16 • 1080×1920Full-screen vertical mobile videos & reels
Instagram Feed1:1 or 4:51080×1080 (Square) or 1080×1350 (Portrait)
Link Preview Cards1.91:1 • 1200×630Open Graph metadata images for FB/Twitter
Common Aspect Ratios Reference
| Aspect Ratio | Decimal | Standard Resolutions | Primary Use Cases |
|---|---|---|---|
| 16:9 | 1.7778:1 | 1920×1080, 3840×2160, 1280×720 | HD/4K TV, YouTube, Widescreen Monitors |
| 9:16 | 0.5625:1 | 1080×1920, 720×1280 | TikTok, Instagram Reels, Shorts, Mobile Vertical |
| 4:3 | 1.3333:1 | 1024×768, 1600×1200, 1440×1080 | SD Television, iPad Screens, Retro Gaming |
| 1:1 | 1.0000:1 | 1080×1080, 2048×2048 | Instagram Square Posts, Avatars, Icons |
| 21:9 | 2.3333:1 | 2560×1080, 3440×1440 | Ultrawide Gaming Monitors, Anamorphic Cinema |
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