This California alimony calculator calculates California maintenance using the California county alimony formulas. Complete the fields below and press calculate to estimate alimony.The figures presented are based on legal California alimony guidelines. Maintenance, or spousal support, is crucial when major life changes occur within family dynamics. Use our California maintenance calculator. Calculating Debt Payoff. If you have unpaid child support debt, you can figure out how long it will take to pay it off with our Arrears Payoff Calculator. This calculator is intended to be used only as a general tool to estimate potential splits and payments. The calculator below can provide you with an estimate as to how a court may handle alimony. The Payment Estimator applies the statewide uniform guideline calculation to the information that you enter into the blank fields.