I guess part of the answer depends on what level of detail you want to be able to calculate.
For example, the late W4RNL gives the feedpoint impedance of antennas on various ham bands
in the articles on his web site, such as these:http://www.cebik.com/content/a10/wire/iocf.pdfhttp://www.cebik.com/content/a10/wire/abd.htmlhttp://www.cebik.com/content/gup/gup5.htmlhttp://www.cebik.com/content/gup/gup9.htmlhttp://www.cebik.com/content/gup/gup10.htmlhttp://www.cebik.com/content/gup/gup11.html
This will give you an idea of what impedances to expect when you use a particular antenna
on various bands, but not to the level of detail of changing from, say, 0.5 wavelengths
to 0.55 wavelengths.
The late W2PV's book on Yagi Antenna Design includes formulas for the reactance of an
element near 1/2 wavelengths long. Several books, including the ARRL Antenna Book,
contain graphs of resistance and reactance vs. length for some specific wire size, though
the detail might not be sufficiently accurate for some purposes.
So if you can give us a better idea of your application, and the sorts of questions you are
trying to answer, we might be able to provide you with information that meets your needs.
Otherwise it is a pretty complex answer that handles all the possible cases.