Replacing Foam for Diningroom Chair

[D3Gilmore]

I have some 1-1/2" foam with a firmness and compression of 1.8/45lb.  Would that be typical to use on diningroom chairs?  I have hardwood seat bottoms and the foam has completely given out.  I just feel the wood.  I have some time and wanted to replace the fabric today but wondered if I should be using a more firm foam for such a hard wood seat?

Thanks!

[MinUph]

I never got the numbers in 48 years. Sit on it and see. LOL

[sofadoc]

I use 18/50 in DR seats all the time.

But like Paul says "If it feels good, do it".