calculating inductance formula
For ceramic capacitor values, the first two digits are the value, the third digit is the tens multiplier, in picofarads. 

Thus: 


  104 = 10 * 10000 = 100 nF  = 0.1 microfarad
  102 = 10 * 100   = 1000 pf = 1 nanofarad
  183 = 18 * 1000  = 18 nF   = 0.018 microfarad


A simple lookup table exists here. 



For the inductance calculation, the question does not specify whether self-inductance of a coil with an air-core or some other core is required, or mutual inductance of multiple coils. In any case, this Wikipedia link provides calculation methods; On the assumption that a single coil with an air core is under discussion, this formula will serve the purpose.

For a single layer solenoid, or a circular loop, the relevant formulae are listed in the table on that page.