Compare aspect ratios, calculate crop dimensions, and see how your images fit different formats.
| Ratio | Decimal | Common Uses |
|---|---|---|
| 1:1 | 1.00 | Instagram square, album covers |
| 4:5 | 0.80 | Instagram portrait, 8×10 vertical |
| 3:2 | 1.50 | 35mm film, DSLR, 6×4 prints |
| 4:3 | 1.33 | Micro 4/3, most smartphones, old TVs |
| 5:4 | 1.25 | 8×10 prints, large format |
| 16:9 | 1.78 | HD video, modern displays |
| 9:16 | 0.56 | Stories, Reels, TikTok |
| 2.35:1 | 2.35 | Cinemascope widescreen |
What happens when I change aspect ratios? If the ratios don't match, you'll need to crop (lose pixels) or add padding (letterbox/pillarbox). This calculator shows what you'll lose when cropping.
Should I crop in camera or in post? If possible, shoot wider and crop in post for more flexibility. But visualizing the final crop in camera helps with composition.
What's the best ratio for Instagram? 1:1 (square), 4:5 (portrait), or 1.91:1 (landscape). Portrait (4:5) takes up the most screen space in feeds.