Head-to-head comparison

Black Beans (cooked) vs Kidney Beans (cooked): Which Has More Protein?

On paper, Black Beans (cooked) and Kidney Beans (cooked) solve a similar problem — protein intake — but they get there differently enough to be worth a direct look.

Black Beans (cooked)

8.9gprotein / 100g

132 cal · 0.5g fat · $ · Quality 0.6

Kidney Beans (cooked)

8.7gprotein / 100g

127 cal · 0.5g fat · $ · Quality 0.6

Gram for gram, Black Beans (cooked) and Kidney Beans (cooked) are close: 8.9g vs 8.7g of protein per 100g — a difference small enough that it shouldn't be the deciding factor.

Neither has a meaningful edge on protein quality; they're close enough on amino acid profile that it isn't a differentiator here.

Cost is roughly comparable between the two ($), so budget isn't the deciding factor here.

Verdict

These two are closer than the comparison headline suggests. Either Black Beans (cooked) or Kidney Beans (cooked) works well in most contexts — let cost, prep time, and personal preference decide rather than the macros.

Full nutrition comparison

Per 100gBlack Beans (cooked)Kidney Beans (cooked)
Protein8.9g8.7g
Calories132127
Fat0.5g0.5g
Carbs23.7g22.8g
Fiber8.7g6.4g
Quality score0.60.6
Relative cost$$
Prep time90 min90 min

Frequently asked

Which has more protein, black beans (cooked) or kidney beans (cooked)?

Black Beans (cooked) has 8.9g of protein per 100g compared to Kidney Beans (cooked)'s 8.7g.

Which is lower in calories?

Kidney Beans (cooked) is lower in calories per 100g, at 127 vs the other's 132.