Coffee pH Level Directory
The pH of coffee ranges from about 4.5 to 6.0 -- always acidic, regardless of how it is marketed. This directory tracks 63 coffees, ranked by how transparently each brand or study reports its data. Every pH value shows its source, date, and verification status.
What the data shows: Of 31 low-acid coffee brands in this directory, 17 publish no pH number at all (Tier 3). Only 8 entries across all categories come from independent lab tests or peer-reviewed studies (Tier 1).
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Transparency tier legend
Which coffees publish a pH? Full directory
Default sort: most transparent first (Tier 1), then by pH ascending. Filter by type or tier below. All rows are server-rendered -- crawlers see the complete table.
Sorted by transparency tier (most independently verified first), then pH ascending. Tier 1 = independent lab or peer-reviewed study. Tier 2 = self-reported number. Tier 3 = markets low-acid, no number published. Tier 4 = no data found. How to read this data →
Methodology: how we verify pH claims
What is pH and why does it matter for coffee?
pH measures acidity on a 0-14 scale. Pure water is pH 7 (neutral). Coffee typically falls between pH 4.5 and 6.0 -- always acidic. Lower pH means more acidic. For people with acid reflux, GERD, or sensitive stomachs, the difference between pH 4.5 and pH 6.0 can be meaningful.
How we assign transparency tiers
Tier 1 -- Independent lab test or peer-reviewed study. The gold standard. Tier 2 -- Brand or source reports a specific number, but no named independent lab. Tier 3 -- Brand markets as low-acid but publishes no pH value. Tier 4 -- No pH data or low-acid claim found.
Data integrity rules
We never invent, round, or clean up a pH value. Null stays “Not published.” We surface LOW CONFIDENCE flags (e.g., competitor-sourced tests) plainly. We never present a self-reported number as independently verified. Every value shows its source, date, and verification status.
Conditions matter
Coffee pH varies significantly by brew method (cold brew is less acidic than drip), roast level (dark roast is slightly less acidic than light), and water chemistry. Where known, we record the conditions under which a pH was measured. A pH measured for espresso cannot be compared directly to one measured for drip.
Matcha is less acidic than coffee -- but it is not alkaline
Brewed matcha is mildly acidic at pH 5.6-6.3 (Najman et al., Molecules (2023)). Brewed coffee sits around pH 4.85-5.1. Because pH is a logarithmic scale, that gap means coffee delivers several times more acid per cup than matcha -- a real difference, even though neither drink is alkaline.
Second lever: caffeine. Matcha contains roughly half the caffeine of a cup of coffee, and its L-theanine content produces a slower, steadier release. For people who experience jitters, crashes, or digestive discomfort from coffee, the combination of lower acidity and lower caffeine load is often the meaningful difference.
Note: this is general information, not medical advice. If you have GERD, acid reflux, or a digestive condition, consult a healthcare provider before changing your diet.