There is no single caffeine number for all matcha powder. A practical estimate for a typical 1–2 gram serving is roughly 20–70 mg, but cultivar, harvest, powder strength, serving size and laboratory method can move the result. If the package provides a caffeine value, use that product-specific information first.
Why estimates vary
- Serving size: twice as much powder generally means roughly twice as much caffeine.
- Tea material: shade, cultivar, harvest and processing affect the caffeine in the leaf.
- Preparation: unlike brewed tea, matcha powder is consumed, so none of the powder is left behind in a strainer.
- Testing: nutrition databases and product labels use different samples and methods.
How to estimate your cup
Start with the serving size in grams. If a label gives caffeine per gram, multiply by the grams you use. If there is no label, use a broad range rather than a false exact figure. A level teaspoon can weigh differently depending on how it is filled, so a small scale is more reliable.
Matcha compared with other tea
Matcha often contains more caffeine per gram than a lightly brewed green tea because the whole powdered leaf is consumed. Coffee can contain more or less caffeine per drink depending on bean, brew method and serving size. Comparisons are meaningful only when the portions are similar.
Caffeine safety
Caffeine can affect sleep, anxiety, heart rate and stomach comfort. Count matcha alongside coffee, tea, chocolate and energy drinks. Pregnancy, medication use and caffeine-sensitive conditions may require a lower limit; ask a qualified clinician for individualized advice. This article gives an estimate, not a laboratory measurement or medical recommendation.