Matcha Green Tea: Understanding Caffeine Levels

A 240 ml serving of matcha (1 tsp) has 70 mg of caffeine.

• Matcha (240 ml, 1 tsp) has 70 mg of caffeine — about 2.5× the caffeine of a 240 ml brewed green tea (28 mg).
• Average caffeine halves every ~5.7 hours; from 70 mg, ~34 mg remains after 6 hours and ~16 mg after 12 hours.
• Matcha delivers caffeine from whole ground leaves, so it typically produces steadier alertness than brewed tea or espresso of comparable mg.
• FDA recommends up to 400 mg/day for healthy adults; pregnancy guidance is ~200 mg/day and the American Academy of Pediatrics discourages routine caffeine for adolescents.

Matcha vs. other common drinks: direct comparison

Use the table below to compare exact caffeine values from authoritative food-data compilations and industry measures. The dataset values are shown verbatim.

How matcha's caffeine differs from brewed tea and coffee

Matcha is powdered whole tea leaf (tencha stoneground) — you ingest the leaf, not just an infusion. That raises measured caffeine per serving versus steeped green tea because fewer soluble compounds are left behind in the leaves. The combination of caffeine and the amino acid L-theanine in matcha is associated with a smoother, less jittery subjective effect in clinical summaries cited by institutions such as the Mayo Clinic.

Onset and duration

Caffeine absorption is similar chemically across sources, but delivering leaf solids (matcha) tends to produce more gradual absorption than a rapid espresso spike. For many people matcha produces alertness that is steadier over several hours rather than a sharp peak-and-crash.

How much caffeine remains over time (decay math)

Population-average caffeine half-life ≈ 5.7 hours. Fraction remaining = 0.5^(hours/5.7). Below are concrete numbers from three dataset doses.

Practical takeaway: if you drink a 70 mg matcha in the late afternoon, expect ~34 mg still active six hours later — enough to affect sleep for sensitive people. For guidance on sleep timing and cumulative daily intake, tracking time-stamped entries in an app like CoffeeLog is useful.

Factors that change caffeine in a matcha serving

Exact mg depends on measurable and practical variables:

• Powder amount: dataset baseline is 1 teaspoon → 70 mg; doubling powder ≈ doubles caffeine.
• Leaf grade and harvest: shade-grown tencha (used for ceremonial matcha) concentrates caffeine and L-theanine compared with sun-grown leaves.
• Particle size and tamping: finer powder disperses more uniformly; scooping vs weighing changes the mass per teaspoon.
• Water volume and dilution: a larger latte dilutes mg per 100 ml but not total caffeine—total depends on powder mass.
• Preparation style: whisked matcha suspends leaf solids so you ingest all leaf caffeine; steeped powdered blends or weak scoops lower mg.

Health, safety, and recommended limits

Authoritative guidance: the U.S. FDA identifies up to 400 mg/day as a safe level for most healthy adults; many pregnancy guidance sources cite ~200 mg/day as a prudent upper limit, and the American Academy of Pediatrics discourages routine caffeine in adolescents. The European Food Safety Authority (EFSA) and Mayo Clinic offer similar advice on sensitive populations.

Matcha's 70 mg per 1-tsp serving means three servings approach 210 mg; a single serve fits easily within adult limits but counts toward the total from other sources (coffee, energy drinks, chocolate, pills). People with anxiety, arrhythmias, or on stimulant-interacting drugs should consult their clinician.

Choosing the right matcha for your caffeine needs

Ceremonial matcha is typically higher-grade and often used in small scoops for flavor, while culinary matcha is intended for lattes and baking and you may use larger quantities. If you want lower caffeine, use half a scoop, choose a younger harvest with lower caffeine, or switch to decaffeinated tea alternatives.

Practical serving advice

• Standard baseline: 1 tsp matcha → 70 mg. Adjust powder mass proportionally to change caffeine.
• To avoid sleep disruption, avoid matcha within ~6 hours of bedtime if you are sensitive (because ~48% remains after 6 hours).
• Track cumulative mg from all sources (coffee, energy drinks, pills, chocolate). Apps such as CoffeeLog let you log servings and timestamps automatically.

Where to learn more and data sources

Drink-by-drink caffeine numbers here use standard compilations consistent with USDA FoodData Central and beverage manufacturer disclosures. Daily-limit guidance appears in FDA recommendations; pregnancy and clinical notes align with guidance from EFSA, the Mayo Clinic, and the American Academy of Pediatrics. For personal advice about pregnancy, medication interactions, or suspected caffeine sensitivity, consult a healthcare professional.

How do I calculate total caffeine from matcha plus other drinks during a day?

You calculate total active caffeine at any moment by summing the milligrams still present from every previous dose using the decay model used on this site (population-average half-life ≈ 5.7 hours (342 minutes)).

Cumulative exposure is the sum of active caffeine mass from all sources at a given time.

Practical method: for each prior serving, take the dataset dose in mg (for example, Matcha 70 mg, Drip coffee 96 mg, Red Bull 80 mg), compute remaining mg = D × 0.5^(hours since serving / 5.7) using the decay model used on this site, then add the remaining amounts. For example, using dataset values: a 70 mg matcha at 09:00, a 96 mg drip coffee at 13:00, and an 80 mg Red Bull at 16:00 produce the following remaining caffeine at 18:00 (decay math shown inline). The matcha at 09:00 → 70 × 0.5^(9/5.7) ≈ 23.4 mg remaining; the drip coffee at 13:00 → 96 × 0.5^(5/5.7) ≈ 52.2 mg remaining; the Red Bull at 16:00 → 80 × 0.5^(2/5.7) ≈ 62.7 mg remaining. Summing those three gives ≈ 138.3 mg active at 18:00, well under the U.S. FDA's 400 mg/day limit for healthy adults (FDA).

Use our caffeine half-life calculator to do this arithmetic automatically and save time when you combine matcha with other drinks.

How should I adjust matcha serving size by body weight?

To scale matcha servings for body weight, convert a daily or single-dose limit into milligrams per kilogram and then compare with a 70 mg matcha serving; 1 teaspoon matcha = 70 mg in the dataset.

Dose per kilogram is mg divided by body weight in kg.

Example conversions: the FDA's adult guidance of up to 400 mg/day corresponds to 400 ÷ 70 ≈ 5.7 typical 1-tsp matcha servings to reach that number, so five full 70 mg servings = 350 mg (still below 400 mg) while six servings = 420 mg (exceeds the FDA recommendation). For a 70 kg adult, 400 mg/day equals 400 ÷ 70 ≈ 5.7 mg/kg per day; the EFSA pregnancy advice of ~200 mg/day equals 200 ÷ 70 ≈ 2.9 mg/kg for the same 70 kg example (EFSA). Use the site tool at safe daily limit by body weight to calculate your personal thresholds and convert those into how many 1-tsp (70 mg) servings are safe for you.

Can I use matcha as a pre-workout caffeine source and how much is effective?

Matcha's 70 mg per 1-tsp serving is a light pre-workout dose compared with many pre-workout scoops or energy products in the dataset (for example, a pre-workout scoop = 200 mg); you can use matcha alone for a mild boost or combine it with another source to reach your target dose while watching cumulative totals.

An ergogenic dose is the amount of caffeine that measurably improves exercise performance.

Practical guidance: if you plan to use matcha before exercise, remember the EFSA mentions 200 mg as a notable single-dose point in safety discussion; combining a 70 mg matcha with a 200 mg pre-workout scoop yields 270 mg total, which is below the FDA 400 mg/day mark but above EFSA's single-dose 200 mg flag (EFSA, FDA for daily context). If you want a controlled approach, have one 1-tsp matcha (70 mg) about 30–90 minutes before exercise and measure subjective response; compare that to dataset alternatives in the pre-workout guide and consider swapping to a 200 mg source only if you tolerate caffeine well.

If I swap one cup of drip coffee for one 1-tsp matcha, what changes should I expect?

Swapping a 240 ml drip coffee (96 mg in the dataset) for a 1-tsp matcha (70 mg) reduces immediate caffeine intake by 96 − 70 = 26 mg and reduces residual caffeine hours later because both decay at the same half-life but start from different doses.

Equivalent caffeine swap is comparing milligrams and expected decay over the same interval.

Concrete comparison at 6 hours after drinking: using the decay model used on this site (half-life ≈ 5.7 hours), the matcha 70 mg leaves about 70 × 0.5^(6/5.7) ≈ 33.8 mg remaining, while the drip coffee 96 mg leaves about 96 × 0.5^(6/5.7) ≈ 46.2 mg remaining. So one matcha saves roughly 12–13 mg of active caffeine at that 6-hour point compared with one drip coffee. Expect subjective effects to differ as well: matcha typically pairs caffeine with L-theanine, which clinical summaries and consumer-facing sources such as the Mayo Clinic describe as creating a smoother alertness profile; see our matcha vs coffee comparison and black coffee vs green tea for practical tasting and timing differences.

How do I plan matcha so it won't interfere with sleep?

If you are concerned about sleep, use the decay model used on this site to estimate how much caffeine will remain at your bedtime and compare that with sleep studies that show substantial sleep reduction from large pre-bed caffeine doses.

Bedtime impact is how much active caffeine remains when you try to sleep.

Example: Drake et al. (2013) found that 400 mg taken 6 hours before bedtime reduced total sleep time by more than an hour (Drake et al., J Clin Sleep Med), so use that as a reference point when planning. For a concrete smaller example, a 70 mg matcha consumed 6 hours before bed leaves about 70 × 0.5^(6/5.7) ≈ 33.8 mg active at bedtime; while that is far below the 400 mg used in Drake et al., individuals vary in sensitivity and some people report sleep disruption from much lower residual amounts. For a quick check, our latest cup before bed tool will estimate the last reasonable time to have a 70 mg serving given your planned bedtime and sensitivity assumptions.

Bottom line

One 1-tsp serving of matcha in the dataset contains 70 mg of caffeine. Using the decay model used on this site with a population-average half-life ≈ 5.7 hours (342 minutes), remaining caffeine after t hours = 70 × 0.5^(t / 5.7). Numerically, that means about 48.6 mg remain after 3 hours, ≈ 33.8 mg after 6 hours, ≈ 23.4 mg after 9 hours, and ≈ 16.3 mg after 12 hours.

Safety context: the U.S. FDA guidance for most healthy adults is up to 400 mg/day (FDA), and EFSA highlights 200 mg/day as the prudent pregnancy upper limit and treats 200 mg as a notable single-dose point in its 2015 opinion (EFSA). Practically, that means about five 70 mg matcha servings (5 × 70 = 350 mg) stay under 400 mg, while three servings (3 × 70 = 210 mg) already exceed the ~200 mg pregnancy limit. For sleep, large single doses have measurable effects six hours later in controlled studies (Drake et al., 2013), so avoid late afternoon/evening matcha if you are sensitive: a 70 mg matcha consumed six hours before bedtime still leaves ≈ 34 mg active.

Use our calculators and guides to convert these numbers into personal choices: the half-life calculator for on-the-fly arithmetic, safe daily limit by body weight to scale limits to your mass, and the matcha caffeine guide for product and preparation tips. If you have pregnancy, adolescent, cardiac arrhythmia, or medication concerns, consult a clinician before changing intake; the dataset values above give the precise milligrams you can show them for faster advice.