Aspect Ratio Calculator
Calculate aspect ratios and scale dimensions online. Paste 1920×1080, get 16:9, scale to any width with proportions locked.
Aspect ratio calculator
×= 16:9
Scale (aspect locked)
→ 1280 × 720
How to use
- Paste input or drop a file above.
- Adjust options (delimiter, dialect, quality, ratio).
- Copy result or download — no sign-up needed.
FAQ
Fractions rounded?
Scaled sides round to whole pixels — off-by-one is normal and invisible.
Which presets?
16:9, 4:3, 1:1, 9:16, 3:2, 21:9 — one click fills the inputs.