It calculates at 3 preset values and one for the moisture content you desire to dry your wood to.
The fiber saturation point (FSP) is preset @ 30. This based on that in most publications this is used as an average value but 28% for North American species sounds like a better option. The FSP for some of the tropical species appear to be much lower.

The Calculation

1. enter the total tangential shrinkage %
2. enter the total radial shrinkage %
3. enter the total volumetric shrinkage %
4. enter the desired moisture content
5. enter the fiber saturation point of the wood species (preset @ 30%)

The Results

1. shrinkage of wood dried to 20 % MC
2. shrinkage of wood dried to 15 % MC
3. shrinkage of wood dried to 6% MC
4. shrinkage of wood dried to your selected % MC
5. TS/TR ratio