Yes, in the State of Utah, alimony is calculated using a three step process. First, the court will evaluate your needs. To determine this, you need to make a monthly expense sheet, which is basically like a budget, that lists amounts for each of your necessary expenses, such as rent, food, entertainment, utilities, car payment, gas, tithing, etc. Let's say, for example, that your monthly needs are $4,500 and that includes yourself and your kids. Then, the court will look at your ability to support yourself. Let's say that you can earn $2,500, and you also receive the child support I stated previously in the amount of $1,085, which means that you will have $3,585 in income. That means you are short about $1,000 every month.
Now, the court will look at your husband. Let's say he earns $5,000 and his expenses are $2,000, he pays child support of $1,085. That means he has $2,000 extra per month (approx.). That means he has the "ABILITY TO PAY" you what you need - which is approx $1,000 per month in alimony.
I hope that is helpful.