My Husband would like to lose some weight. Please help.?

My husband is currently 250lbs, and he wishes to lose some weight. He has gone on plenty of websites saying how many calories he should eat in a day, how many he should burn and how much exercise is good. He has been doing this for the passed month. He would go for runs at night, him and I would go out and play sports, and the only time we would eat out is when we go to SubWay. He chooses whole wheat over white, and all that fun stuff, but I