Aspect Ratio Calculator
Find the missing side, or simplify a ratio.
Leave one side blank to solve it from the ratio. Fill both to simplify the ratio.
Height
1,080
Worked example
A 16:9 frame that is 1,920 pixels wide is 1,080 pixels tall. Enter both sides, 1920 and 1080, and the simplified ratio is 16:9.
FAQ
- How do I solve for a missing side?
- Fill the ratio and the side you know. Leave the unknown side blank.
- How is a ratio simplified?
- The two pixel counts are divided by their greatest common divisor. 1920 and 1080 become 16 and 9.
- Can I use centimetres instead of pixels?
- Yes. The maths is the same for any unit, as long as both sides use that unit.