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.