Developer Tool
Aspect Ratio Calculator
Calculate and scale aspect ratios free online. No signup.
Enter Dimensions
Result
Aspect Ratio
16:9
Decimal
1.7778
Percentage
56.25%
16:9
✅ Matches 16:9 — HD Video, YouTube, Widescreen
Common Aspect Ratios
1:1Square, Instagram
4:3Traditional TV, iPad
16:9HD Video, YouTube, Widescreen
16:10MacBook, Widescreen monitors
21:9Ultrawide monitors, Cinema
3:2DSLR photos, iPhone
2:3Portrait photos, Mobile
9:16TikTok, Reels, Stories
4:5Instagram portrait
1.85:1US Cinema
2.39:1Anamorphic Cinema
5:4Old monitors, prints