Find out how alimony (spousal support) is awarded and calculated in Virginia. To calculate Illinois guideline maintenance, you must enter gross income, child dependent, and marriage length information into the calculator.Calculate alimony quickly and accurately with our state-specific alimony calculators. Get an estimate based on your state's guidelines for free. MaritalLaws Alimony Calculator. Gross Salary: Salary before taxes are taken out. The Virginia Maintenance (Alimony) Calculator makes Virginia pendente lite maintenance calculations with one click of the mouse. Use this calculator the get an estimate of alimony for the state of Virginia! Find out what judges consider when deciding how much alimony to award during or after divorce—and when courts use formulas to calculate spousal support. This may be during separation or in the case of an ongoing divorce.