Video Aspect Ratio Calculator
Compute a video aspect ratio (16:9, 21:9, 4:3) from its dimensions. Enter your values, click Calculate, and get the full result with its breakdown — everything is processed on your device, nothing is sent to a server.
All calculations run in your browser. Your data is never sent to our servers.
Example
Example Input
2560 × 1080
Example Output
64:27 (~21:9)
How to Use
- 1Fill in each input field with the values you want to compute.
- 2If there are choices (units, mode, operation), pick what you need.
- 3Click the Calculate button (or press Ctrl+Enter).
- 4The main result and its breakdown appear in the Result area. Click Copy to copy it.
About the Video Aspect Ratio Calculator
The Video Aspect Ratio Calculator reduces a video's width:height to a standard ratio (16:9, 21:9, etc.) plus the decimal value. Useful for video production, letterboxing, and exporting to different platforms.
Conceptually identical to aspect ratio, focused on video.
FAQ
Is this Video Aspect Ratio Calculator accurate?
Yes. It uses standard formulas and runs directly in your browser at full JavaScript precision (plus BigInt/decimal.js for large numbers where needed).
Is my data sent to a server?
No. All calculations happen entirely on your device. No values are sent to or stored on our servers.