Are black beans high in oxalate?
C
Moderately. Moderate, 11 mg per 1/2 cup cooked
Range 11 to 11 mg across 1 study, 86 g serving
0 mg50 mg = a day60 mg+
Lower-oxalate swap: Chickpeas, grade B, about 5.9 mg per 1/4 cup dry (about 1/2 cup cooked).
Black beans have a moderate amount of oxalate: about 11 mg per 1/2 cup cooked, which is 22% of the 50 mg a day many stone clinics aim for.
Boiling and draining lowers oxalate, because the soluble part leaches into the water. Compare the raw and boiled rows below.
Where this number comes from
Each row is one published measurement, converted to a 86 g serving (1/2 cup cooked). The grade and the range use the rows prepared the way the serving is eaten, and take the middle. How the grades work.
| Per serving | Per 100 g | Preparation | Source |
|---|---|---|---|
| 11 mg | 12.21 mg | Boiled | Harvard T.H, 2023 |
By Oliver Silen · Data checked November 2, 2026 · Not medical advice