Determining pain and suffering is not an exact science, but there are two common methods that attorneys use to estimate damages caused by pain and suffering. These two methods are the Multiplier method and the Per Diem method. The Multiplier method totals up the amounts of damages incurred by an accident and multiplies it by a number typically between 1.5 and 5%, depending on the severity of the injury. The Per Diem method determines the daily financial loss someone has experienced due to their accident.