Caffeine in Chinese Tea: How Much Is in Green, White, Oolong, Black and Pu-erh?

All real tea contains caffeine: green, white, yellow, oolong, red (black) and pu-erh alike. A cup usually holds somewhere around 12–43 mg per 100 ml, and that range depends far more on the specific tea and how you brew it than on its colour. Buds and young leaves carry more caffeine than mature leaves, broken leaf releases it faster than whole leaf, and hotter water, longer steeps and more leaf all pull out more. So a bud-heavy white tea can be stronger than a red tea, and "white tea is low in caffeine" is a myth.

I'll be honest: I learned this the hard way. For years I told friends that white tea was the gentle, low-caffeine choice for the evening, because that's what I'd read. Then one night I brewed a strong gongfu session of Silver Needle at nine o'clock and lay awake until two. Pure buds, lots of leaf, hot water: of course it kept me up. Here's what actually decides how much caffeine ends up in your cup.

How much caffeine is in tea?#

Dry tea leaf contains roughly 2–5% caffeine by weight. In the cup, measurements usually land at about 12–43 mg per 100 ml. That's a wide range, and it's wide on purpose: two green teas can sit at opposite ends of it, and so can two red teas.

For a typical 250 ml mug brewed Western style, that works out to very roughly 30–110 mg. Gongfu brewing is harder to pin down: you use much more leaf, but each steep is short and each cup is tiny. A long gongfu session with a full gaiwan can easily add up to more caffeine than a single mug, simply because you're drinking a lot more tea.

Caffeine by tea type: what you can and can't say#

You'll see confident claims online that black tea has "several times less" caffeine than green, or the reverse. Neither holds up. Comparisons of real teas show the ranges overlap almost completely: it depends on the raw material and the brewing, not the colour.

What raises and lowers caffeine in your cup#

Two points surprise people:

Buds are the strongest part of the plant. The tea bush concentrates its alkaloids (caffeine and its relatives theobromine and theophylline) in the youngest growth. That's why a white tea made only from buds can hit harder than a red tea made from bigger leaves.

Broken leaf releases caffeine faster. Small pieces have more surface area. A tea bag gives you most of its caffeine in the first minute or two; whole leaf releases it more slowly across several steeps.

Does rinsing tea remove caffeine?#

Not much. A quick rinse is useful for waking up the leaf and washing off dust, especially with pu-erh and dark tea. But a few seconds in hot water removes only a small share of the caffeine, and you'll still get plenty in the following steeps. If you want less caffeine, use less leaf or cooler water, or stop after a few steeps.

Pu-erh caffeine: sheng vs shou#

Pu-erh has a confusing reputation. Some sources call it a high-caffeine tea; others sell shou as the perfect evening tea.

• Sheng (raw) pu-erh is made from large-leaf Assamica tea, often with plenty of buds in younger cakes. Strong young sheng is one of the most stimulating teas I drink. I don't touch it after mid-afternoon.
• Shou (ripe) pu-erh goes through wet piling before pressing. Many experienced drinkers and tea masters say shou and dark teas are gentler, and that matches my experience. But I haven't seen lab measurements that confirm it, so treat it as an observation, not a fact. Shou still has caffeine.

More on the difference in sheng vs shou pu-erh.

Is "theine" different from caffeine?#

No. "Theine" is simply an old name for caffeine found in tea. It's the same molecule. You'll sometimes read that theine "forms from tannin and caffeine" or that it's a gentler cousin of caffeine. It isn't.

Why tea feels different from coffee#

If it's the same molecule, why does tea feel so different? Tea also contains L-theanine, an amino acid found almost exclusively in the tea plant. The combination of caffeine and L-theanine is associated with a calmer, more focused alertness, and that's one of the few tea effects that's been reasonably well studied in people.

In practice:

• Coffee gives a quicker, sharper lift, and many people feel a drop afterwards.
• Tea tends to come on more gently and last longer, and it fades out gradually.

That's why coffee culture is built around a cup on the go, and tea culture around sitting for an hour or two.

A mug of brewed coffee usually contains more caffeine than a mug of tea. But a two-hour gongfu session with a lot of leaf can catch up. Tea drinkers call the relaxed, slightly floaty feeling after a big session of strong tea (often pu-erh) "tea drunk". If you ever feel shaky or lightheaded after tea, you've simply had too much, especially on an empty stomach. Eat something and take a break.

My session: two teas, same evening#

On two evenings a week apart, I brewed at 8 pm and noted how I slept. Not science, just my log.

Evening 1: Silver Needle, 5 g, 90 °C, eight steeps. Bright, clear-headed, pleasant. Then awake past midnight.

Evening 2: shou pu-erh, 4 g in a small gaiwan, four light steeps, finished by 8:45. Warm, calm, slept normally.

One person, two evenings. It proves nothing about you, but it changed my habits.

What I drink in the evening#

Everyone reacts differently, so this is what works for me, not a rule:

• Brew light: less leaf, a small vessel, fewer steeps.
• Eat something first.
• Finish 2–3 hours before bed.
• Good evening choices for me: light shou pu-erh, dark tea, roasted oolong, GABA oolong.
• I avoid in the evening: young sheng, bud-heavy white and green tea, jasmine pearls, anything brewed strong.

If you're sensitive to caffeine, pregnant, or have a health condition, ask your doctor how much is right for you.

Lowest-caffeine options#

If you want the tea experience with less caffeine:

• Cold brew. Cold water extracts caffeine slowly, so a cold brew is usually gentler than a hot one. See cold brew tea.
• Mature-leaf teas like Shou Mei, hei cha or roasted oolong, brewed light.
• Fewer steeps. Stop after three or four.
• Herbal infusions like chrysanthemum, which aren't tea and have no caffeine.

Myths about caffeine in tea#

"White tea has the least caffeine." Not for bud teas. Silver Needle is one of the stronger teas you can drink.

"Black tea has several times less caffeine than green." The ranges overlap. It depends on the leaf and the brewing.

"Pressed tea releases less caffeine than loose tea." Not confirmed. Once the leaves unfurl, they behave much like loose leaf.

"A rinse removes the caffeine." It removes very little.

"Theine is gentler than caffeine." They're the same molecule; L-theanine is what changes the feeling.

My honest take#

Stop choosing tea by colour if caffeine matters to you. Look at the leaf (buds or mature leaves), and control the brewing: fewer grams, cooler water, fewer steeps. That tells you far more than whether the label says green, white or black.

The bottom line#

All Chinese tea has caffeine, usually around 12–43 mg per 100 ml. Buds, broken leaf, more leaf, hotter water and longer steeps push it up; mature leaves, cold brewing and light brewing bring it down. Colour alone won't tell you much. For the whole family of teas, start with my guide to the types of Chinese tea.

Read next: Green vs White vs Black Tea and Does Tea Go Bad? How to Store Loose Leaf Tea (By Type).