Aspect Ratio Calculator
Find aspect ratio or resize while maintaining proportions.
CALCULATE
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Formulas
Ratio = W : H (simplified by GCD)1920×1080 = 16:9. 1080×1080 = 1:1.
Common Aspect Ratios
16:9: HD video, most monitors. 4:3: old TV, iPad. 1:1: Instagram square. 9:16: phone vertical, Stories/Reels. 21:9: ultrawide. 3:2: DSLR photos. 2:1: 18:9 phones.
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