✳ FREE CALCULATOR
Aspect ratio calculator
Reduce any width × height to its simplest ratio, and solve for the missing side when you know the ratio and one dimension.
- Simplified ratio
- 16:9
- Decimal ratio
- 1.7778
- Orientation
- landscape
- Height at 1080 px wide
- 608 px
Even-dimension safe value: 608 px - H.264 requires even width and height.
Calculated as: ratio = width ÷ gcd : height ÷ gcd; solved height = new width × height ÷ width
What this assumes
- Assumes square pixels. Anamorphic footage carries a separate pixel aspect ratio this does not model.
- H.264 with 4:2:0 chroma needs even dimensions, so the rounded even value is shown alongside.
Koldflux works these numbers out for you when it exports - the calculators exist because our own pipeline needed them first.
Automate this in Koldflux