Aspect Ratio Calculator
Calculate and convert aspect ratios for images, videos, and screens — find missing dimensions instantly
Common presets
Aspect Ratio
16:9
Decimal Ratio
1.7778
Orientation
Landscape
16:9 — Standard HD/widescreen (YouTube, TV, monitors)
4:3 — Classic screen / presentation format
9:16 — Mobile / vertical video (Instagram Reels, TikTok)
4:5 — Instagram portrait posts
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