Just a fun question. I have about 30 bars I've bought from here and there. I'm a guy and I really don't spend a lot time in the shower...just long enough to shampoo my hair and to lather up once and then the rinse. Maybe 5 minutes time on an average workday. So, I really don't use soap up that quickly. I'm estimating a 4 oz bar lasts around a month for me. At that rate, I have enough soap to last 2.5 years!