Is decaf coffee high in oxalate?
A
No. Very low, 2.2 mg per 1 cup
Range 2.2 to 2.2 mg across 1 study, 240 g serving
0 mg50 mg = a day60 mg+
Decaf coffee is low in oxalate: about 2.2 mg per 1 cup, which is 4% of the 50 mg a day many stone clinics aim for.
Where this number comes from
Each row is one published measurement, converted to a 240 g serving (1 cup). 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 |
|---|---|---|---|
| 2.2 mg | 0.92 mg | Instant, prepared | Harvard T.H, 2023 |
By Oliver Silen · Data checked November 2, 2026 · Not medical advice