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How to Use
2-Term Ratio Tab
Enter the base ratio on the left (e.g., 16 and 9), then enter one known value on the right (e.g., 1920) to automatically calculate the other value (e.g., 1080).
Use the ⇄ button to swap the input and output sides for reverse calculation.
Multi-Term Ratio Tab
Calculate ratios with three or more terms. Enter the ratio for each row, then input a base value in any one row to automatically calculate the others. The blue-highlighted row is the base row.
Integer Ratio Suggestions
When the result is a decimal, the nearest integer ratio candidates appear automatically. Click a suggestion to apply it.
Presets
Quickly apply common ratios (16:9, Golden Ratio, A4, etc.) from the dropdown with a single click.