Some soup recipes want the soup to cook on the stove for a few hours. Most of the time it is not a problem for me to do that if I am home. However, sometimes I have to leave the house for a few hours and I do not like leaving with the stove on. To me, crock pots seem safer for that. I am not asking about the safety of leaving the house with the stove on though. I want to know what setting to put the crock pot on if the soup recipe says to simmer on low (referring to the stove).