Aspect Ratio Calculator
Calculate image dimensions while preserving aspect ratio.
Resize photos for print, web, and social media formats.
Scaled Dimensions
Aspect ratio is the proportional relationship between width and height.
Aspect Ratio = Width / Height
Common aspect ratios:
- 1:1 — Square (Instagram posts)
- 4:3 — Standard photo (most digital cameras)
- 3:2 — Classic 35mm film, DSLR photos
- 16:9 — Widescreen video, YouTube thumbnails
- 9:16 — Vertical video (TikTok, Reels, Stories)
- 5:4 — 8×10 prints
- 4:5 — Instagram portrait posts
Scaling formula (keep aspect ratio):
New Height = New Width × (Original Height / Original Width)
Social media recommended sizes (pixels):
- Instagram post: 1080 × 1080 (1:1)
- Instagram story: 1080 × 1920 (9:16)
- Facebook cover: 820 × 312 (~2.63:1)
- YouTube thumbnail: 1280 × 720 (16:9)
- Twitter post: 1200 × 675 (16:9)