Kidney Beans (cooked)
1 cup (177g)Protein per 100g8.7g
Calories per 100g127
Fat per 100g0.5g
Carbs per 100g22.8g
Fiber per 100g6.4g
Leucine (per serving, est.)600mg
Typical cost$
Quality 0.6
incomplete on its own — low in methionine, pairs well with grains
veganvegetariangluten-free
Why Kidney Beans (cooked) shows up in protein-forward diets
Must be boiled at a rolling boil for at least 10 minutes if cooked from dry — undercooked kidney beans contain a lectin (phytohaemagglutinin) that causes real GI illness, one of the few genuine food-safety notes on this list.
Serving-size math
A 1 cup (177g) portion delivers 15.4g of protein and roughly 225 calories. Scaled per 100 calories, that works out to 6.85g of protein — useful for comparing against other foods on a calorie-matched basis rather than a weight-matched one.
Prep tip
Canned kidney beans are pre-cooked safely and skip the lectin risk entirely — most home cooks should just use canned.
Best for
- budget vegan protein
Frequently asked
How much protein is in kidney beans (cooked)?
8.7g per 100g, or 15.4g per 1 cup (177g).
Is kidney beans (cooked) a complete protein?
It's a moderate-quality protein source: incomplete on its own — low in methionine, pairs well with grains.