How do I determine the radius (in terms of solar radii) for stars with masses of 0.3, 0.7, 1.0 and 1.3 solar masses?

Anyone have any advice for how I could go about this?
All I really know is the more massive a white dwarf is, the smaller its radius, but that doesn't really help with calculations.

*Sorry, I don't know if this thread belongs in Astronomy or Physics

How do I determine the radius (in terms of solar radii) for stars with masses of 0.3, 0.7, 1.0 and 1.3 solar masses?


If they're main sequence stars, this table gives the radius as a function of mass
http://www.essex1.com/people/speer/main.html

For white dwarfs, the radius is proportional to 1/M^(1/3). That might help. I actually had to derive the formula for it last week for my astronomy homework. Ughhh...