Free Florida alimony calculator to estimate annual alimony payments and monthly alimony payments. Our alimony calculator will provide you with a basic support calculation for the following states or formulas.Learn how judges make decisions on alimony in Washington—whether to award maintenance, how much, and for how long—and whether you can change an award later. How much alimony can I expect to pay in Florida? Our simple, easy to use alimony calculator will provide the answer. MaritalLaws Alimony Calculator. Gross Salary: Salary before taxes are taken out. The following calculator provides an estimate of a potential alimony award in the State of Washington. Learn about the types of alimony available in Florida and how judges decide which type to award, how much the payments should be, and how long they'll last. The following calculator provides an estimate of a potential alimony award in the State of Florida.