Aspect Ratio Calculator
Calculate image and video aspect ratios and find missing dimensions instantly
Aspect Ratio Calculator
Enter values on the left side of the equation and one of the two values on the right side, then click calculate
Aspect Ratio Result
Common Aspect Ratios
Select from common aspect ratios to quickly calculate dimensions:
Dimension Results
Understanding Aspect Ratios
An aspect ratio is the proportional relationship between the width and height of an image, screen, or display. It's expressed as two numbers separated by a colon (e.g., 16:9).
How to Calculate Aspect Ratio
To calculate the aspect ratio, divide the width by the height and simplify the fraction. For example, for an image that is 1920x1080 pixels:
1920 ÷ 1080 = 16/9 = 16:9
This means for every 16 units of width, there are 9 units of height.
Common Uses
- Photography and image editing
- Video production and editing
- Web design and responsive layouts
- Screen and display specifications
- Social media image requirements
Common Aspect Ratios and Their Uses
| Aspect Ratio | Common Name | Typical Uses |
|---|---|---|
| 1:1 | Square | Instagram posts, some mobile photos |
| 4:3 | Standard | Older TVs, some tablets, digital cameras |
| 16:9 | Widescreen | HDTV, most computer monitors, YouTube |
| 16:10 | Widescreen | Some computer monitors, tablets |
| 21:9 | Ultrawide | Cinema, some computer monitors |
| 3:2 | Classic | 35mm film, some digital cameras |
How to Use the Aspect Ratio Calculator
This tool helps you calculate the aspect ratio and pixel dimensions of images and videos. This can be used to ensure that you are working with the correct proportions.
To create the correct ratio, divide the length by the width. For example: for a 2:3 aspect ratio: 3 ÷ 2 = 1.5, then you can use this ratio to calculate other dimensions.
Our calculator works in two ways:
- Calculate from dimensions: Enter the width and height on the left side, and either width or height on the right side to find the missing dimension.
- Use common ratios: Select a common aspect ratio and enter one dimension to calculate the other.
This is useful for:
- Resizing images while maintaining proportions
- Creating responsive web designs
- Setting up video projects with specific aspect ratios
- Converting between different aspect ratios
- Planning social media content with specific dimension requirements
Frequently Asked Questions
What is an aspect ratio?
An aspect ratio is the proportional relationship between the width and height of an image or screen. It's expressed as two numbers separated by a colon, such as 16:9.
How do I calculate aspect ratio?
To calculate aspect ratio, divide the width by the height and simplify the fraction. For example, an image that is 1920 pixels wide and 1080 pixels high has an aspect ratio of 1920:1080, which simplifies to 16:9.
What is the most common aspect ratio?
The most common aspect ratios are 16:9 for widescreen displays and videos, 4:3 for older TVs and some tablets, and 1:1 for square images like Instagram posts.
Why is aspect ratio important?
Aspect ratio is important because it determines how content will appear on different screens and devices. Using the wrong aspect ratio can result in stretched, squashed, or cropped images and videos.