Aspect Ratio Calculator
Calculate aspect ratios from dimensions or find missing dimensions based on a ratio.
100% Client-Side
Ratio
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What is Aspect Ratio Calculator?
An aspect ratio calculator finds the proportional relationship between width and height, or scales dimensions while maintaining the same ratio. It's widely used in photography, video editing, web design, and display configuration.
How to Use
- Enter the original width and height
- The calculator shows the simplified aspect ratio (e.g., 16:9)
- Enter a new width or height to scale proportionally
- Use preset ratios for common formats like 4:3, 16:9, or 1:1
Formula
Aspect Ratio = Width : Height (simplified by GCD). New Height = New Width x (Original Height / Original Width)
Frequently Asked Questions
- What are the most common aspect ratios?
- 16:9 is standard for widescreen monitors and YouTube. 4:3 is traditional TV. 1:1 is square (Instagram posts). 9:16 is vertical video (TikTok, Reels).
- How do I maintain aspect ratio when resizing an image?
- Change only one dimension (width or height) and calculate the other using the ratio. This prevents stretching or squishing.
- What aspect ratio is 1920x1080?
- That's 16:9, the standard Full HD widescreen ratio used by most modern monitors and TVs.