Aspect ratio calculators let you enter one dimension (width or height) and instantly get the other, while maintaining the exact proportions you need. Each calculator below is tailored to a specific standard ratio used in video production, photography, web design, and display technology. Select the ratio that matches your project requirements.
Aspect Ratio Calculators
Calculate dimensions for standard aspect ratios used in video, photography, and digital media.
Available Tools
Universal Aspect Ratio Calculator
Calculate any aspect ratio with custom dimensions
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16:9 Aspect Ratio Calculator
Standard widescreen format for Full HD, 4K, and most modern displays
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21:9 Aspect Ratio Calculator
Ultrawide cinematic format for immersive displays and movies
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4:3 Aspect Ratio Calculator
Classic format for traditional photography and older displays
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3:2 Aspect Ratio Calculator
Standard DSLR camera format for professional photography
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4:5 Aspect Ratio Calculator
Instagram portrait format for feed posts and social media marketing
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9:16 Aspect Ratio Calculator
Vertical format for TikTok, Instagram Reels, and Stories
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16:10 Aspect Ratio Calculator
Professional display format for productivity and design work
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Cinematic Aspect Ratio Calculator (2.35:1 & 2.39:1)
Ultra-widescreen formats for film production and theatrical releases
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Frequently Asked Questions
An aspect ratio is the proportional relationship between the width and height of an image, video, or screen. It is expressed as two numbers separated by a colon, such as 16:9 or 4:3. The first number represents the width, and the second represents the height.
It depends on the platform and medium. Use 16:9 for YouTube videos and presentations, 9:16 for TikTok and Instagram Reels, 4:5 for Instagram feed posts, 3:2 for photography prints, and 21:9 for cinematic content. Each calculator page has detailed guidance for its specific ratio.
Yes. Enter your desired width or height in any unit (pixels, inches, centimeters) and the calculator will return the corresponding dimension. For print work at 300 DPI, multiply inches by 300 to get pixel values.
All calculations use the exact mathematical ratio (width divided by height). Results are precise to the pixel. For non-integer results, values are rounded to the nearest whole pixel to ensure practical usability.
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