Design & colour
Aspect ratio calculator
Simplify dimensions and resize proportionally.
A clear answer. Here’s how.
Reduces integer dimensions by their greatest common divisor. New height = new width × original height ÷ original width. Decimal output is shown before pixel rounding.
See a worked example
Worked example
A fixed demonstration, separate from the values you enter above.
- Original width
- 1920
- Original height
- 1080
- New width
- 1280
Example result
- Aspect ratio
- 16:9
- New width
- 1,280
- New height (exact calculation)
- 720
- New height (nearest pixel)
- 720