Aspect Ratio Calculator: Find Missing Width or Height Instantly
Instantly calculate missing width or height for any aspect ratio! Supports 16:9, 4:3, 21:9 & custom ratios. Perfect for video, design, and resizing. Try it now, 100% free!
Aspect Ratio
Set your desired width to height ratio
Pixel Dimensions
Dimensions calculated based on your aspect ratio
Preview
1920 × 1080 pixels
How to Use This Calculator 
- 1.a.i.Select a ratio → Choose from
Common Presets16:9 (YouTube), 4:3 (iPad), 21:9 (ultrawide), or enter a custom ratio. - 2.b.ii.Enter one value → Width or height ( leave the other blank ).
- 3.c.iii.Get the result instantly! → The missing dimension calculates automatically.
- 4.d.iv.Copy with ease → Click the
copybutton next to any value to copy it to your clipboard.
Example: For a 16:9 video at 1920px width, height = 1080px ( click the copy button to save this value! )
Tip: Change either value at any time - the calculator updates in real-time!
Common Aspect Ratios & Uses
| Ratio | Name | Best For | Popular Resolutions |
|---|---|---|---|
| 16:9 | Widescreen | YouTube, Netflix, Gaming | 1920×1080, 1280×720 |
| 4:3 | Standard | Old TVs, Retro Games | 1024×768, 800×600 |
| 1:1 | Square | Instagram Posts | 1080×1080 |
| 3:2 | Classic Photography | DSLR Cameras, Prints | 3600×2400, 1800×1200 |
| 16:10 | Widescreen (Alternate) | Productivity Monitors | 1920×1200, 1680×1050 |
| 21:9 | Ultra Widescreen | Cinematic Movies, Gaming | 3440×1440, 2560×1080 |
| 32:9 | Super Ultra Widescreen | Immersive Displays | 5120×1440, 3840×1080 |
| 2.39:1 | CinemaScope | Hollywood Films | 4096×1716, 2048×858 |
| 2.35:1 | Anamorphic Widescreen | Feature Films | 2350×1000 |
| 2.76:1 | Ultra Panavision 70 | Epic Cinema (Ben-Hur) | 2760×1000 |
| 1.85:1 | Theatrical Widescreen | Modern Movies | 1850×1000 |
| 5:4 | Old Monitor | Vintage Displays | 1280×1024 |
| 18:9 | Univisium/Mobile | Smartphones | 2160×1080 |
| 2:1 | Univisium | Digital Cinema | 2000×1000 |
| 4:1 | Super Wide | Panoramic Views | 4000×1000 |
| Custom | - | Any unique design needs | Any size! |
FAQs 
Q: How do I calculate a custom aspect ratio?
→ Simply type your ratio (e.g., 5:4) in the width/height fields, then enter one dimension.
Q: What’s the height for a 4:3 image if width is 1200px?
→ Answer: 900px ( Try it in the calculator above! ).
Q: Is this tool free?
→ 100% free! , no signup.
Why Use This Tool? 
Saves time – No manual math!
Works for any ratio – Presets + custom inputs.
Perfect for video editors, designers, gamers, and social media creators.
Bookmark this page for quick access!
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