When I consider the fact that I probably already have enough soaps and creams to last the rest of my life, I don't bother trying to do the math on it. But I will say that if you pick up a puck of DR Harris, it'll shock you how long it takes to use the whole thing up. Its a small puck but never seems to go anywhere. Same thing with MDC. After a dozen uses it still looks exactly like it did when it arrived. But if value for your money is a primary concern, I have to second the Arko suggestion by MisterMoo. It performs exceptionally well and is really cheap. I don't know what product (soap/cream/goo) lasts the longest but when it comes to value, Arko is tough to beat.