Matcha & Tea Caffeine Calculator
Estimate how much caffeine is in matcha green tea and other teas from powder weight or brewed serving size. See the result in mg and as a share of the FDA 400 mg daily figure.
Result
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Estimated caffeine
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- Share of FDA 400 mg daily figure
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How much caffeine is in matcha and tea?
If you are asking how much caffeine in matcha green tea, the key difference is that matcha uses the whole leaf. This calculator models matcha from powder weight: about 32 mg of caffeine per gram, so a typical 2 g serving is about 64 mg.
Leaf teas are modeled from brewed liquid volume using typical caffeine values per 8 fl oz (240 ml): 47 mg for black tea, 28 mg for green or white tea, 38 mg for oolong, and 0 mg for herbal or rooibos. Steeping time changes the estimate with a documented approximate multiplier.
The daily percentage compares the estimate with the FDA's 400 mg per day figure for healthy adults. It is a comparison point, not a personalized recommendation.
Matcha caffeine = powder grams × 32 mg; leaf tea caffeine = serving ratio × caffeine per 8 fl oz × steeping multiplier All caffeine values are approximate typical values. Matcha uses powder weight; leaf teas use brewed liquid volume. Steeping multipliers are approximate: 1 minute 0.6×, 2 minutes 0.8×, 3 minutes 1×, and 5 minutes 1.15×.
Matcha and tea caffeine FAQ
How much caffeine is in 2 grams of matcha?
Using the calculator's approximate 32 mg per gram figure, 2 grams of matcha contains about 64 mg of caffeine, or 16% of the FDA 400 mg daily figure.
Why does matcha use grams instead of water volume?
Matcha is made from the whole tea leaf, so this estimate scales with the amount of powder consumed rather than the amount of water used.
Does steeping time change the caffeine estimate?
Yes. This calculator uses approximate multipliers of 0.6× at 1 minute, 0.8× at 2 minutes, 1× at 3 minutes, and 1.15× at 5 minutes for leaf teas.
What does the FDA 400 mg figure mean?
The FDA cites 400 mg per day as an amount not generally associated with negative effects for healthy adults. Individual sensitivity and circumstances vary.
Are my entries saved?
No. The calculation runs in your browser and this tool does not need an account or a network call.