CSS Aspect Ratio Calculator
Calculate CSS aspect-ratio property from width and height. Get the simplified ratio for use in CSS aspect-ratio property.
How to Use This Calculator
- Enter width and height dimensions.
- The calculator displays the simplified aspect ratio.
- Copy the CSS aspect-ratio value to use in your stylesheet.
- Use this to maintain aspect ratios in responsive designs.
CSS Aspect Ratio Formula
The ratio is simplified using GCD:
GCD = Greatest Common Divisor of Width and Height
Simplified Width = Width / GCD
Simplified Height = Height / GCD
CSS Value = aspect-ratio: Simplified Width / Simplified Height;
Example: 1920×1080: GCD = 120, Simplified = 16/9. CSS: aspect-ratio: 16 / 9; 1600×1200: GCD = 400, Simplified = 4/3. CSS: aspect-ratio: 4 / 3; The calculator automatically simplifies ratios to their simplest form for use in CSS.
Full Description
The CSS Aspect Ratio Calculator helps you calculate the CSS aspect-ratio property value from width and height dimensions. The CSS aspect-ratio property sets the preferred aspect ratio for an element, ensuring it maintains its proportions when resized. This is essential for responsive design and maintaining proper image/video aspect ratios.
The calculator uses the Greatest Common Divisor (GCD) algorithm to simplify ratios to their simplest form. For example, 1920×1080 simplifies to 16/9, and 1600×1200 simplifies to 4/3. The CSS syntax is aspect-ratio: width / height; (e.g., aspect-ratio: 16 / 9;). The property is supported in modern browsers (Chrome 88+, Firefox 89+, Safari 15+) and works by automatically adjusting one dimension when the other is set.
This calculator helps you create CSS aspect-ratio values. Enter width and height, and it calculates the simplified ratio and CSS code. Use it for responsive design, maintaining image/video proportions, CSS styling, or understanding aspect ratios. The aspect-ratio property is a powerful tool for modern web development!
Frequently Asked Questions
What is CSS aspect-ratio property?
CSS aspect-ratio is a property that sets the preferred aspect ratio for an element. Syntax: aspect-ratio: width / height. Example: aspect-ratio: 16 / 9; maintains 16:9 ratio. It ensures elements maintain their aspect ratio when resized. Supported in modern browsers (Chrome 88+, Firefox 89+, Safari 15+).
How is the ratio simplified?
The calculator uses GCD (Greatest Common Divisor) to simplify ratios. Example: 1920×1080: GCD = 120, simplified = 16/9. 1600×1200: GCD = 400, simplified = 4/3. This gives the simplest form of the ratio for use in CSS.
How do I use aspect-ratio in CSS?
Use: aspect-ratio: width / height; Example: aspect-ratio: 16 / 9; for 16:9 ratio. You can also use decimal: aspect-ratio: 1.777; but the fraction form is preferred. The property works with width or height—the other dimension adjusts automatically.
What are common aspect ratios?
Common ratios: 16/9 (widescreen), 4/3 (standard), 1/1 (square), 21/9 (ultrawide), 16/10 (widescreen monitor). The calculator simplifies any ratio automatically. Use it to find the CSS aspect-ratio value for any dimensions.