Free Florida alimony calculator to estimate annual alimony payments and monthly alimony payments. North Carolina doesn't provide a formula for calculating postseparation support or alimony.Our alimony calculator will provide you with a basic support calculation for the following states or formulas. There isn't a specific formula for calculating alimony in North Carolina, and the calculator above should be considered a rough estimate. Get an estimate for alimony payments and duration. Get an idea on how much money a month you can expect to pay, and for how you can expect to pay it. The following calculator provides an estimate of a potential alimony award in the State of Florida. 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. Florida law prohibits any modification of bridge-the-gap alimony, either in the amount or the duration of the payments. We've built a calculator using guidelines and formulas from states and jurisdictions around the country.