18.5 ring vs. 22. 5 ring

[Shaun H]

A filled up 18.5 is about how much in the 22.5? Maybe 3/4?

 

[Gene_N]

Assuming the ring is 4". The volume of the 18.5" ring is 1075 in3 and the 22.5" ring is 1590 in3. 1075/1590 = 67%.

 

[Shaun H]

Thanks for the math!