Aspect Ratio Calculator
Work with exact integer ratios and clearly labeled approximate common formats.
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Aspect Ratio Calculator formula
Ratio = width ÷ height. Missing width = height × ratio; missing height = width ÷ ratio.
Worked example
1920 × 1080 simplifies to 16:9.
How to use this calculator
- Choose a calculation mode.
- Enter dimensions or a target ratio.
- Review and copy the proportional result.
Important assumptions and limitations
Common ratios are labeled exact only when they match; near matches are marked approximate.
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Frequently asked questions
How are ratios simplified?
Integer dimensions use their greatest common divisor.
Can portrait ratios be calculated?
Yes, including formats such as 9:16.