Calculate alimony quickly and accurately with our state-specific alimony calculators. Get an estimate based on your state's guidelines for free.The Virginia Maintenance (Alimony) Calculator makes Virginia pendente lite maintenance calculations with one click of the mouse. To calculate Illinois guideline maintenance, you must enter gross income, child dependent, and marriage length information into the calculator. MaritalLaws Alimony Calculator. Gross Salary: Salary before taxes are taken out. Find out how alimony (spousal support) is awarded and calculated in Virginia. Divorce alimony calculator laws refer to the specific legal guidelines each state has established to calculate the amount of alimony or spousal support. Use this calculator the get an estimate of alimony for the state of Virginia! The Johnson County Formula uses gross incomes to calculate alimony payments.