Aspect Ratio Calculator
Gratis aspect ratio calculator. Bereken verhoudingen van breedte en hoogte, en pas vervolgens een van de assen aan om dezelfde verhouding te behouden. Voor afbeeldingen, video, design.
Runs in your browserUpdated Apr 26, 2026
Aspect ratio calculator
Resize to fit a new width
Ratio
16:9
Decimal
1.7778
Veelgestelde vragen
›How do I calculate aspect ratio?
Divide width by height, then simplify the resulting fraction. We do it for you and show common-name matches (16:9, 4:3, etc.).
›Can I resize keeping the ratio?
Yes — enter a new width and the height auto-adjusts (or vice versa) to maintain the original ratio.
›What's the most common video ratio?
16:9 for landscape (HD/4K video, YouTube), 9:16 for vertical (TikTok, Instagram Reels), 1:1 for square (Instagram feed).
›Is the calculator free?
Yes — fully free, no signup.