USDA FoodData Central
Compare food density.
Put foods on the same gram basis and compare calories, protein, and protein per 100 calories without relying on different package serving sizes.
Add foods to compare
This lookup sends the food you search for to USDA FoodData Central (api.nal.usda.gov) from your browser. If you add your own data.gov key, it is sent to USDA too.
Comparison
Add at least two foods to compare them.
Why use a common basis?
Package serving sizes can differ. This calculator applies one gram amount to each selected USDA record, then reports protein per 100 calories so the comparison is easier to interpret.
Source: USDA FoodData Central. Values are estimates and may vary by food variety, preparation and brand.
Informational comparison
Protein density is one metric, not a recommendation. Dietary needs vary; consult a qualified professional for medical or performance nutrition advice.