What weight Feline Pine equals the same volume of clay litter?

I usually use a 35lb bucket of clay litter, but how much Feline Pine would I need to buy to get the same volume?

What weight Feline Pine equals the same volume of clay litter?
I used to just put it in the litter pan to about two inches deep.


However.


I discovered my cat was allergic to it. I couldn't figure why she had itchy bumps all over, and the vet said it might be some allergy. Then one day I ran out and couldn't get any more. A few days after I switched back to the clay type the bumps started to go and they haven't come back..I like the pine type best but I think my cat is allergic.


.So if you use it keep an eye on your cats skin and coat.