May be this url help you

http://www.5circles.com/van-westendorp-pricing-the-price-sensitivity-meter/

You can find an Excel file on http://wwwg.uni-klu.ac.at/stochastik.schule/Boro/index_inhalt

Under the heading Descriptive Statistics you find an Excel button with a link to

Cumulative distribution function (increasing and decreasing)

You can also use the direct link to the Excel file:

http://wwwg.uni-klu.ac.at/stochastik.schule/Boro/EXCEL/E_16_Westerndorp_MB

http://wwwg.uni-klu.ac.at/stochastik.schule/Boro/index_inhalt

http://wwwg.uni-klu.ac.at/stochastik.schule/Boro/EXCEL/E_16_Westerndorp_MB

Anna-Maria Günther , Do you still need this? I have developed and easy-to-use version, which uses VBA, so you just need Excel to run it. Please contact me, if you still need this. :)

Aku-Ville Lehtimäki Hi, I would love to try it if it is okay. Just trying to find a tool to my students in pricing course :)

If you really want a solution, I had given you a link to an excel file for exactly that problem.

Aku-Ville Lehtimäki Hey there, I would also like to use it. I am trying to do a VWD for my Bachelor Thesis but I can't seem to figure it out. I am beyond desperate at this Point.

Aku-Ville Lehtimäki Hi, I'm also looking for an easy solution to calculate the price sensitivity. I would really appreciate your excel tool!