I think, I recommended to you this planning-tool recently:
RutasASantiago - Planning-tool
On the principal page "inicio" you select one of the routes, then on the page of the selected route you take the second option "Configurador de etapas".
Then you are directed to a sheet where you select the starting-point "inicio" (on the left) and the final destination "final" of your camino.
With "Seguir con la Configuración" you are directed to another sheet, where you see the accomodation and services available on that route and can choose your daily distances. On the left you select where you want to sleep "dormir aqui?" and the tool shows you how many km you have to walk that day and finally - after all stages are fixed - how many days you will need to cover the whole distance.
When you have finished your planning, you can download your planning and print it out "Discarga tu planificación de etapas e su microguía".
BC
Alexandra