Coffee → tea converter
Pick your coffee and a tea to get the approximate number of cups with similar caffeine.
Ranges are shown because studies report different numbers. General information, not medical advice. Sources and method
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Health and sleep
Is Decaf Coffee Caffeine-Free?
Decaf coffee has little caffeine, but not none: figures from a study (0–13.9 mg per 473 ml), the EU rule and who should care about the leftovers.
29 October 20263 min readHealth and sleepTea During Pregnancy: A Guide to Your Daily Cup
Which tea is okay during pregnancy: the caffeine limit (up to 200 mg a day), black, green, matcha, decaf and herbal teas.
27 October 20264 min readHealth and sleepCaffeine and Sleep: What the Research Shows
How much caffeine shortens sleep and delays falling asleep: numbers from two meta-analyses (22 and 24 studies), the role of dose and timing, and the limits of the research.
26 October 20264 min read