Well, I'm not expecting his approach to work for skiing. I just mentioned skiing because the packweight is higher due to winter gear. And at that packweight his calculator will not return an answer. Anyway, what I am looking for is somewhat different than what the calculator is set up to do. His premise was to determine how far he  or anyone else  could go unsupported given a known starting baseweight, known weight of food per day, and known level of fitness. My interest is in working out how much more time (expressed as a percentage) I would expect to travel each day for each pound added to my packweight, when covering the same distance. Or another way yo look at it would be how much slower will I go in miles per hour (again, as a percentage) for each added pound. Which is data that I expect could be extracted from the calculations Mr. Dial uses to get the answer he is after if I rearrange them appropriately. He's interested in miles per day, base packweight, and total distance in his answers, where what I am after is a percentage of time on the move  which is unaffected by mode of travel. At a given level of fitness and a given level of output, I can ski or walk for the same amount of time  my distance traveled will be different, but that is irrelevant to what I am after, which is time.
