How much caffeine is in White tea?

A standard 240 ml (8.1 fl oz) cup of brewed white tea contains 16 mg of caffeine, which works out to 6.7 mg per 100 ml. That single cup supplies just 4 % of the widely cited 400 mg daily safe limit for healthy adults set by the FDA (2023) and EFSA (2015). For perspective, the same volume of typical drip coffee holds 96 mg—a full six times more—so white tea delivers a fraction of the caffeine load of a standard coffee.

White tea is made from the youngest leaves and buds of the Camellia sinensis plant, processed with minimal oxidation. This gentle handling preserves a delicate flavour profile and, generally, a lower caffeine content than more oxidized teas. Yet even within the white tea category, the actual caffeine in your cup depends on leaf grade, water temperature and steep time—factors we explore in the variants section below. When you drink white tea, the caffeine reaches peak bloodstream concentration around 45–60 minutes, producing a mild alertness that rarely jitters, making it a popular choice for an afternoon lift without the overstimulation many coffee drinkers report.

How long White tea stays in your system

Once caffeine enters your body, it is cleared primarily by the liver via first-order elimination, with a population-average half-life of 5.7 hours (based on pharmacokinetic studies). Starting from the 16 mg dose in one cup of white tea, the amount still circulating after 3 hours is approximately 16 mg × 0.5^(3/5.7) ≈ 11 mg; after 6 hours roughly 8 mg remain; after 9 hours about 5 mg; and after 12 hours only around 4 mg linger. These numbers—rounded from the exponential decay—show how a seemingly small initial dose diminishes slowly over the waking hours.

If you drink a 240 ml cup of white tea at 15:00 (3 p.m.), by 23:00 (11 p.m.)—eight hours later—your system still holds about 6 mg of caffeine (16 mg × 0.5^(8/5.7)). While that amount is tiny compared with a coffee, individuals who are slow metabolisers or especially sensitive may feel a subtle effect on sleep latency. For the average person, however, a mid-afternoon white tea is unlikely to compromise a regular bedtime. You can model how your own cup timing affects the remaining caffeine with our caffeine half-life calculator.

The FDA’s 400 mg daily guidance for healthy adults translates to 25 cups of white tea at the 16 mg level—far more than anyone would drink for hydration alone. Because each cup contributes only 4 % of the daily ceiling, it is virtually impossible to approach that limit through white tea unless you consume it exclusively and in extreme volume. Even if you enjoy three or four cups across a day, your total caffeine from those would be 48–64 mg, still well under a single drip coffee. This leaves generous room for other caffeine sources if you sometimes switch to a higher-caffeine drink. For a personalised safe limit based on your body weight, use our safe daily limit calculator.

Sleep disruption from caffeine depends on how much remains in your bloodstream at bedtime, and white tea’s modest dose works in your favour. Assuming you go to bed at 23:00, our latest-cup-before-bed tool suggests that a 16 mg dose can be consumed as late as around 19:00 without residual caffeine exceeding 5 mg at lights-out. At that level, the majority of adults will not experience a measurable increase in sleep latency, according to Drake et al. (2013), who found that 400 mg six hours before bed still cost over an hour of sleep. A single white tea at dinner time (18:00) leaves roughly 8 mg at 23:00, a quantity below the detection threshold for most. Those with a pronounced sensitivity or a diagnosed sleep disorder may still prefer to keep white tea to the morning.

Special populations should apply stricter ceilings. The European Food Safety Authority’s 2015 scientific opinion recommends a maximum of 200 mg per day for pregnant individuals, which white tea fits easily: up to 12 cups would remain within that limit. Adolescents, whose nervous systems are still developing, should ideally keep daily caffeine below 2.5 mg per kilogram of body weight, as suggested by Health Canada; for a 50 kg teenager, that means 125 mg per day, or about 8 cups of white tea. Breastfeeding parents and those with certain medical conditions should consult their healthcare provider, but the low figure means white tea is rarely the source of concern.

Among true teas—those made from Camellia sinensis—white tea consistently ranks at the low-caffeine end of the spectrum. A 240 ml cup of black tea delivers 47 mg, Earl Grey and English Breakfast both around 50 mg, oolong 37 mg, and even the comparably mild green tea averages 28 mg—about 75 % more than white tea. Matcha, which uses whole powdered leaves, jumps to 70 mg per 240 ml, and yerba mate (a different plant entirely but often compared) reaches 85 mg. Only herbal infusions like chamomile or peppermint, with 0 mg, are lower.

When placed beside coffee, the contrast is stark. A single shot of espresso (30 ml) holds 63 mg—nearly four white teas’ worth—and a full 240 ml mug of drip coffee registers 96 mg, six times the caffeine. Even a 355 ml can of Coca-Cola Coke Zero contains 34 mg, more than double the white tea figure. For those accustomed to larger coffee servings (350 ml or more), a white tea provides roughly one-tenth the caffeine. This makes white tea a practical stepping-stone for anyone who wants to reduce their overall caffeine intake without switching to entirely caffeine-free liquids. The gentle lift of 16 mg is closer to a square of dark chocolate (around 10–15 mg) than to any typical coffee or energy drink.

Within the broader landscape of many-tea comparisons, the numbers speak clearly: white tea contains a caffeine amount closer to a square of dark chocolate than to any standard coffee serving. If you’re looking to reduce your caffeine load, replacing your afternoon coffee with a cup of white tea cuts the stimulant by roughly 80 mg.

What changes the number for White tea

The 16 mg figure we list for white tea is a well-agreed average for a 240 ml brew made from loose leaves or a standard tea bag, steeped for about 3–5 minutes in water just off the boil. Yet lab-measured values range from as low as 6 mg to as high as 25 mg per cup, depending on a handful of variables that every tea drinker can control. Because white tea is less processed than black or green tea, the caffeine in the raw leaf is preserved, but how much ends up in the cup is a function of extraction, not leaf content alone.

The most influential factor is the proportion of buds to leaves in your tea. Silver Needle (Bai Hao Yin Zhen) white tea consists entirely of young buds, which naturally contain more caffeine than mature leaves; brews made exclusively from such tips can push caffeine up to 20–25 mg per 240 ml. White Peony (Bai Mu Dan), which includes both buds and the top two leaves, typically yields amounts closer to our 16 mg average. Other styles like Shou Mei, made from older leaves, often come in at the lower end of the range, around 10–12 mg per cup.

• Steep time: an extra minute of steeping can increase caffeine extraction by roughly 10–20 %, so a 2-minute steep might deliver 13 mg while a 5-minute steep could reach 19 mg.
• Water temperature: using boiling water (100 °C) extracts caffeine more efficiently than the 70–80 °C often recommended for delicate white teas; a full-boil steep may add 2–5 mg compared with a cooler brew.
• Leaf-to-water ratio: doubling the amount of leaf (e.g., 2 teaspoons instead of 1) nearly doubles the caffeine, though extraction efficiency can drop slightly as the solution approaches saturation.
• Instant or powdered white tea: these concentrated forms can pack 30–40 mg per serving when prepared per packaging instructions, so check the label carefully.
• Decaf white tea: decaffeination processes remove at least 97 % of the original caffeine, leaving typically 0–2 mg per cup. True caffeine-free herbal infusions are described on our herbal tea page.

Because of this variability, our single value is not a guarantee; it is the best estimate from published food composition databases for a typical home preparation. When you drink white tea outside a controlled environment—in a café that may steep it differently or use a unique blend—the actual caffeine can easily differ by 30 % in either direction. Knowing these factors lets you adjust your brew to keep the caffeine where you want it.

Where this figure comes from

The 16 mg reference for a 240 ml white tea brew comes from the United States Department of Agriculture’s FoodData Central (entry “Beverages, tea, white, brewed”), last accessed in late 2024. This value is an average derived from multiple samples of commercially available white tea bags and loose leaves, prepared according to standard laboratory protocols. Other authoritative databases, such as the Australian Food Composition Database and the UK Composition of Foods Integrated Dataset (CoFID), report similar figures between 14 and 20 mg, confirming the consensus. When you see numbers elsewhere—say, 10 mg or 25 mg—they likely reflect different steep parameters or a different leaf-to-water ratio rather than a fundamental disagreement about white tea chemistry.

We treat the 16 mg figure as a living estimate. Our open caffeine dataset is built on published food composition data and, when available, peer-reviewed laboratory analyses; it is updated whenever a new, robust source becomes available. If you have access to a certified lab result for a white tea product that consistently differs from our value, we welcome the contribution. The goal is to give you the most reliable, source-specific number possible so you can make informed decisions. The FDA’s 400 mg daily limit, referenced throughout this page, is taken from the agency’s 2023 consumer update “Spilling the Beans: How Much Caffeine is Too Much?”, which we rely on for population-level safety advice.

Bottom line

Brewed white tea delivers 16 mg of caffeine per 240 ml (8.1 fl oz) cup—just 4 % of the 400 mg daily safe limit for healthy adults and only 0.2 times the caffeine of an equal volume of drip coffee (96 mg). Its gentle stimulant effect and the very low amount that remains at bedtime make it one of the most forgiving caffeinated beverages for anyone monitoring their total caffeine intake.

Whether you’re scaling back from coffee, navigating pregnancy, or simply want a modest lift without the jitters, knowing that a cup of white tea contributes a predictable, minimal dose helps you plan the rest of your day with confidence.