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Aspect Ratio Calculator
Simplest aspect ratio and the matching height for a new width.
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How it works
Divide both sides by their greatest common divisor to get the simplest ratio. 1920 × 1080 simplifies to 16:9. The new height keeps the same proportions: new width × height ÷ width.
FAQ
Is this calculator free?
Yes. No signup is needed and nothing you enter is stored.
Is the result exact?
Results are rounded for display. For financial, medical, or legal decisions, confirm with a professional.
Do my numbers leave my device?
No. The calculation runs in your browser.