Ground beef has 0.26 protein to weight ratio, while pinto beans have 0.22. About 440g of pinto beans for $0.8, so about 120g/$1 for protein. Ground beef accor

Ground beef has 0.26 protein to weight ratio, while pinto beans have 0.22. About 440g of pinto beans for $0.8, so about 120g/$1 for protein. Ground beef according to Google factoid was $4/lb in mid-2015, so about 30g/$1 for protein. It sounds like beef is already an expensive source of protein.