Aspect Ratio Calculator is the most accurate tool to quickly calculate width-to-height ratios for images, videos, or screens like 16:9 or 4:3.
What is Aspect Ratio?
Aspect ratio refers to the proportion of width to height of an image, display, or screen. It determines the shape of a display and how visual content like images and videos appear. The most common standard aspect ratio is 4:3, while widescreen displays typically use 16:9.
This ratio affects how the content is cropped or stretched to fit various screens and can directly influence the visual quality.
How to Calculate Aspect Ratio?
An aspect ratio is calculated by dividing the width of an image or display by its height. The result is expressed as a simplified fraction such as 4:3, 16:9, or 21:9.
To use this tool:
- Enter the width and height of your screen or image in pixels.
- The tool will automatically divide width by height and simplify the result.
- The output is shown as a common display ratio like 16:9 or 4:3.
Tip: You can also calculate it manually by dividing width ÷ height and simplifying the result.
Popular Aspect Ratios and Their Use Cases
Understanding the real-world application of aspect ratios helps in choosing the right one for your project. Below are some of the most common aspect ratios and where they are typically used:
| Aspect Ratio | Common Use | Examples |
|---|---|---|
| 1:1 | Social media posts | Instagram, Facebook |
| 4:3 | Old TV & projectors | Older monitors, PPT |
| 16:9 | HD video & modern displays | YouTube, TVs, laptops |
| 9:16 | Vertical video | Reels, TikTok, Shorts |
| 21:9 | Cinema | Widescreen films |
Aspect Ratio Conversion Table
| Resolution | Aspect Ratio |
|---|---|
| 1024 X 768 | 4 : 3 |
| 1200 X 630 | 40 : 21 |
| 1280 X 720 | 16 : 9 |
| 1280 X 1024 | 5 : 4 |
| 1280 X 800 | 16 : 10 |
| 1280 X 960 | 4 : 3 |
| 1350 X 1080 | 5 : 4 |
| 1440 X 900 | 8 : 5 |
| 1680 X 1050 | 16 : 10 |
| 1900 X 1200 | 19 : 12 |
| 1920 X 1080 | 16 : 9 |
| 1920 X 1200 | 16 : 10 |
| 1920 X 960 | 2 : 1 |
| 2560 X 1440 | 16 : 9 |
| 2560 X 1080 | 64 : 27 |
| 2560 X 1600 | 16 : 10 |
| 3840 X 1600 | 12 : 5 |
| 3840 X 2160 | 16 : 9 |
| 3840 X 2400 | 16 : 10 |
| 5120 X 1440 | 32 : 9 |
| 5120 X 2160 | 64 : 27 |
📏 Want to Convert Pixels to Inches?
Use our Pixel to Inch Converter for accurate print size and screen resolution planning.
Looking for specific aspect ratios?
Explore our dedicated calculators for precise ratios tailored to your needs:
Frequently Asked Questions
- What is a good aspect ratio for video?
16:9 is the most widely used for HD video and streaming platforms like YouTube. - How do I know my screen’s aspect ratio?
Use our calculator above or divide your screen width by its height and simplify the result. - Can I change aspect ratio in editing?
Yes, most video/photo editors allow cropping or adding padding to change the ratio.