This recipe comes from the Oregon State Extension. I used the same mathematical proportions and turned this into an even smaller batch. It will yield enough kraut to fill a 1 pint mason jar and requires one medium head of cabbage. Please see this document for more details about making sauerkraut:
Oregon State University Extension Service: Small Batch Sauerkraut Tips
Below is a step-by-step picture tutorial of my sauerkraut making process. Happy fermenting!