Final wood thickness

[Shawn]

When purchasing raw wood and taking into account losses for jointing and planing, what do you purchase for your desired final thickness?

For example:

4/4 for thicknesses ranging from ? to ? 5/4 for ? to ? 6/4 for ? to ? 8/4 for ? to ?

[Leon]

Typically 1/4" less than what you start with. 4/4 becomes 3/4" thick, 5/4 becomes 1" and so on. That said, very often you can and will end up with thicker pieces depending on how flat the wood is to start with.

[Edwin Pawlowski]

But keep in mind that 5/4 can easily become two 3/8"

[Dave Balderstone]

If straight and not too rough, so can 4/4.