Utility Tools
Aspect Ratio Calculator
Calculate missing dimensions from an aspect ratio, detect the ratio of any two dimensions, and explore common ratios for video, photography, and social media.
Calculate Missing Dimension
Aspect Ratio Presets
I know the…
Width
1920px
Height
1080px
16:9
Ratio
16:9
Decimal
1.7778
Output
1920 × 1080
Detect Ratio from Dimensions
Simplified Ratio
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Decimal
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Common Aspect Ratios
How to use
- 1Pick an aspect ratio preset (16:9, 4:3, 1:1, etc.) or enter custom ratio values in the Ratio Width and Ratio Height fields.
- 2Choose whether you know the width or the height using the toggle, then enter your known dimension in pixels.
- 3The missing dimension is calculated instantly and shown with a visual preview of the ratio.
- 4To detect the ratio of an existing image or video, enter its width and height in the Detect Ratio section.
- 5Browse the Common Aspect Ratios reference at the bottom and click any row to load it into the calculator.
Why Use This Tool?
Aspect ratios come up constantly in web design, video production, photography, and social media — but calculating the correct width or height manually is error-prone. This tool removes the guesswork: enter what you know and get what you need instantly, with a visual preview and a reference table for the most common formats.