Matcha Caffeine: Understanding Your Green Tea Boost

A typical 1-teaspoon prepared serving of matcha (240 ml) contains 70 mg of caffeine.

• 70 mg — caffeine in a standard 1-tsp matcha serving (240 ml).
• 48 mg — roughly what remains 3 hours after a 70 mg dose (≈69% remain).
• 96 mg — caffeine in a 240 ml cup of drip coffee, about 1.4× a matcha serving.
• 400 mg/day — FDA daily upper limit for healthy adults; many pregnancy guidelines recommend ≤200 mg/day.

Average caffeine in matcha tea

Commercial and culinary sources vary, but the dataset reference for a common preparation lists matcha (1 tsp prepared to 240 ml) at 70 mg of caffeine. That makes a single matcha serving stronger than brewed green tea (28 mg per 240 ml) but lower than most coffees such as drip coffee (96 mg per 240 ml) and far lower than concentrated cold brews (200 mg per 240 ml).

Caffeine levels by matcha serving size and preparation

Matcha is powdered whole-leaf tea; you ingest the leaf, so caffeine scales with powder mass. Common serving sizes:

• 1/2 teaspoon (ceremonial light): roughly 35 mg (≈half of 70 mg).
• 1 teaspoon (common single serving): 70 mg (dataset value).
• 1.5–2 teaspoons (strong or latte): approximately 105–140 mg (estimate proportional to powder used).

Exact caffeine depends on powder grade, leaf age, and how much powder you use in a latte; powdered matcha in lattes often uses more mass than a straight whisked cup.

How matcha compares to other caffeinated drinks

Use the table below to compare matcha with common drinks in the dataset. Values are the dataset's reported caffeine amounts.

Drink	Serving	Caffeine (mg)	mg per 100 ml (if listed)
Matcha (1 tsp)	240 ml	70 mg
Green tea	240 ml	28 mg	11.7 mg/100ml
Black tea	240 ml	47 mg	19.6 mg/100ml
Drip coffee	240 ml	96 mg	40 mg/100ml
Cold brew	240 ml	200 mg	83.3 mg/100ml
Espresso (single)	30 ml	63 mg
Red Bull (250 ml)	250 ml	80 mg	32 mg/100ml

How caffeine fades: half-life math and examples

Caffeine elimination follows exponential decay; a population-average half-life is about 5.7 hours. Practical approximate retention: after 3 h ≈69%, 6 h ≈48%, 9 h ≈33%, 12 h ≈23% remain. The table below shows remaining mg for a 70 mg matcha serving and a 126 mg double espresso.

Hours after dose	Remaining from 70 mg matcha (mg)	Remaining from 126 mg espresso (mg)
0 h	70 mg	126 mg
3 h (≈69% remain)	48 mg	87 mg
6 h (≈48% remain)	34 mg	60 mg
9 h (≈33% remain)	23 mg	42 mg
12 h (≈23% remain)	16 mg	29 mg

What changes matcha's caffeine: cultivar, grade, and prep

Factors that raise or lower caffeine per serving:

• Leaf maturity: younger shade-grown leaves used for higher-grade matcha tend to contain more caffeine and L-theanine.
• Powder mass: using more than 1 teaspoon or a double scoop scales caffeine proportionally.
• Water volume and extraction: a latte dilutes caffeine per ml but total mg equals the powder used.
• Serving style: commercial matcha lattes often use larger powder portions than a whisked ceremonial cup.

Health, safety, and timing

FDA guidance sets 400 mg/day as an upper limit for most healthy adults; many authorities (including EFSA and Mayo Clinic summaries) recommend limiting caffeine to about 200 mg/day during pregnancy. The American Academy of Pediatrics discourages caffeine-containing energy drinks for adolescents. If you have anxiety, arrhythmia, or take certain medications, talk to your clinician before raising intake.

For sleep-sensitive people, using the half-life math above: a 70 mg matcha at 6 p.m. leaves roughly 34 mg by midnight — often enough to disturb some people's sleep. Track timing and total intake to manage effects; apps like CoffeeLog can log servings and compute remaining caffeine automatically.

Practical tips: reduce or boost caffeine intentionally

• To lower caffeine: use 1/2 teaspoon, choose lower-grade culinary matcha sparingly, or drink earlier in the day.
• To increase it: add a second scoop (remember ~+70 mg per extra teaspoon) or combine matcha with a small coffee shot—note the additive effect on total mg.
• For steady alertness: matcha’s L-theanine slows caffeine onset and smooths the curve compared with coffee, which some studies and reviews (summarized by Mayo Clinic commentary) find reduces jitters for some people.

Bottom line

Matcha is a concentrated green tea delivering about 70 mg of caffeine per 1-teaspoon (240 ml) serving — larger than brewed green tea but less than many coffees. Use the decay table to estimate residual caffeine before bedtime and follow FDA/EFSA guidance on daily limits. Track servings and timing with a tool like CoffeeLog for precise totals and better sleep planning.