According to that site, we don't. I tend to agree with their numbers as what would be a comfortable living. Our expenses are broken up differently, but the total sounds right. If my husband had full time work, year round, at his usual rate with no vacations, we would be making just over the 60k they list as being what you need for a family of 4.
Which state did you use to calculate? I thought they don't have Canadian places on the list?