Free Florida alimony calculator to estimate annual alimony payments and monthly alimony payments. How much alimony can I expect to pay in Florida?Our simple, easy to use alimony calculator will provide the answer. This calculator is meant to be an informative tool and only reveals the maximum possible amount of alimony you will either pay or receive. Our free alimony calculator will give you an excellent start on your case. You can determine likely figures on how much alimony you will receive or pay. Welcome to Florida Child Support Calculator. The Calculator on this site may make it easier for you to understand how child support is calculated. While there is no set calculation for alimony in Florida, one method often used to calculate alimony in Florida is the needs-based method. Child support payments, on the other hand, do not have tax consequences.