Coffee Data Lab · the authority engine

When the internet disagrees,
we run the numbers.

Flagship tool

The Caffeine Calculator · know your dose.

Every drink in our database sourced from lab analyses and manufacturer disclosures. Pick a drink, set your cups, see the mg, and how it stacks against the 400 mg guideline.

Open the calculator →

brew methods covered, ratio to water temperature, every number sourced

journal articles published, every claim cited to its source

drinks in the caffeine calculator, each with a sourced range

scores influenced by brands or affiliates. Zero. Ever.

Data stories

Latest data stories.

Data6 Nov 2026 · 11 min read

Coffee and Depression: What Two Meta-Analyses and a 50,000-Woman Study Show

Higher coffee intake is linked to lower depression risk in a 2011 study of 50,739 women and two 2016 meta-analyses. See the numbers and what they cannot prove.

Data5 Nov 2026 · 11 min read

Coffee and Gout: What the Studies Say and What They Cannot Tell You

A 12-year study of 45,869 men and a 2016 meta-analysis link coffee to lower gout risk. See the numbers, the decaf result and why it is not a treatment.

Data4 Nov 2026 · 12 min read

Coffee and Sleep: How Late Is Too Late, According to the Research

A 24-study meta-analysis found caffeine cut sleep by 45 minutes on average. See the cutoff times researchers suggest and how to work out your own.

Data3 Nov 2026 · 14 min read

Coffee and Heart Health: Palpitations, Heart Rate, AF and Heart Disease

In the DECAF trial, AF patients told to drink coffee relapsed less (47% vs 64%). See what trials and big cohorts say on palpitations, heart rate and disease.

Data2 Nov 2026 · 16 min read

Coffee and IBS: What the Studies Say and How to Test Your Own Trigger

Heavy caffeine carried 47 percent higher odds of IBS in a 3,362-adult study, and dietitians advise capping tea and coffee at three. Test your own trigger.

Data1 Nov 2026 · 12 min read

Coffee and ADHD: Does Caffeine Help Focus? What the Trials Actually Show

A 2023 meta-analysis of caffeine trials in children with ADHD found no significant benefit over placebo. Here is what the evidence does and does not say.

Exhibit A: how much caffeine is in cold brew? Depends who you ask.

Starbucks Grande, in-store

43 mg

Starbucks bottled RTD

55 mg

High Brew Triple Shot

69 mg

Lab concentrate, max

123 mg

Same drink name, normalised to 100 ml, and the sourced answers still span 3x. Our data pages publish every source, the method behind it, and a reconciled range, so you can check every number yourself.

When the internet disagrees,we run the numbers.