Aspect Ratio Calculator
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About Aspect Ratio Calculator
Enter one value and get the other: resize images and video to 16:9, 4:3, 21:9, 9:16 or custom ratios.
An aspect ratio calculator keeps width and height in proportion when you resize. Type one dimension and it instantly returns the matching one for the ratio you choose, so you never stretch a photo, crop a video wrong or pick the wrong export size. It is used every day by video editors, designers, YouTubers and anyone setting up a new screen.
Common Aspect Ratios
- 16:9: YouTube, TVs and most monitors, such as 1920 x 1080 and 3840 x 2160.
- 9:16: Shorts, Reels, TikTok and stories.
- 4:3: older screens, iPads and many camera sensors.
- 21:9: ultrawide monitors and cinema.
- 1:1: square social posts.
How To Calculate Aspect Ratio
Divide width and height by their greatest common divisor. For 1920 x 1080 that is 120, which gives 16:9. To resize, multiply the new width by height over width in the ratio. For example, a 1280 wide 16:9 image is 720 tall.
Which App The Install Button Opens
The button opens CalcAspect Ratio Calculator on Google Play, which computes width or height live, supports custom ratios, includes a dimension analyzer and keeps a history, with no ads and no tracking. Compare screen shapes with our Screen Size Calculator.
Key Features
- Live width and height calculation
- Presets like 16:9, 4:3, 21:9 and 9:16
- Custom ratios you can save
- Dimension analyzer with simplified ratio
- Calculation history
- No ads and no tracking
Our Take On Aspect Ratio Calculator
What We Like
- Saves time for editors and designers
- Avoids stretched or squashed images
- Private and offline
What Could Be Better
- Focused on ratios, not file conversion
- No batch resizing of real images
Download Safety
- Official source You get it from the official store listing.
- No changes made You install the developer's own build, nothing in between.
Questions People Ask About Aspect Ratio Calculator
01 How do I calculate aspect ratio?
Divide width and height by their greatest common divisor. 1920 x 1080 becomes 16:9.
02 What size is 16:9 at 1080p?
1920 x 1080 pixels.
03 What aspect ratio is best for TikTok and Reels?
9:16 vertical, such as 1080 x 1920.
04 Is Aspect Ratio Calculator free to download?
Yes. Aspect Ratio Calculator is free to download and install.
05 Is it safe to install Aspect Ratio Calculator from here?
Yes. The button opens the official store listing, so you install it the normal way and get automatic updates.
How To Install Aspect Ratio Calculator
- Tap the install button. The official store page opens.
- Tap Install and wait for it to finish.
- Open the app from your home screen.
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