Tea and Caffeine: How Much Is in Black, Oolong, and Green Tea?

Quick Answer

Caffeine in tea varies by type, but black tea generally contains the most, followed by oolong, then green. However, brewing time and leaf grade matter as much as the type. For a lower-caffeine option, choose a green tea like Dragon Well and steep briefly.

Tea drinkers often ask how much caffeine is in their cup. The answer isn't a single number—it depends on the tea type, the leaves, and how you brew. This FAQ breaks down caffeine in black, oolong, and green tea, so you can choose the right cup for your energy needs.

Whether you're switching from coffee or just curious about your afternoon brew, understanding these differences helps you enjoy tea without unwanted jitters or sleepless nights.

How Much Caffeine Is in Black Tea?

Black tea is fully oxidized, which typically results in a higher caffeine content than less oxidized teas. A standard cup of black tea contains roughly 40–70 mg of caffeine, but this can vary. For example, a hearty blend like Masala Chai from Baba's Tea Co uses black tea as its base, so its caffeine level falls in that range.

The exact amount depends on the leaf grade and how long you steep. Whole-leaf black teas often release caffeine more slowly, while broken leaves or fannings steep faster and can yield more caffeine in a shorter time. If you're sensitive, start with a shorter steep.

• To reduce caffeine, steep for 2 minutes instead of 5, and discard the first steep if you're very sensitive.

How Much Caffeine Is in Oolong Tea?

Oolong sits between green and black tea in oxidation, and its caffeine content usually falls in between as well—roughly 30–50 mg per cup. However, the exact amount varies widely by cultivar and roast. Lightly roasted oolongs like Supreme Iron Goddess may have a bit less caffeine than darker roasts like Supreme Da Hong Pao, though both are moderate.

The leaf-to-water ratio also matters. Using the recommended 3g of tea per 6 fl oz water gives you a balanced cup. If you use more leaf, you'll extract more caffeine, even with a shorter steep.

• For a lower-caffeine oolong, choose a lightly roasted variety and steep for 2 minutes at the recommended temperature.

How Much Caffeine Is in Green Tea?

Green tea is the least oxidized of the three, and it typically contains the least caffeine—about 20–45 mg per cup. A classic Chinese green tea like Dragon Well is known for its delicate, sweet flavor, and when brewed at 165°F for 2 minutes, it yields a gentle caffeine lift.

The lower water temperature and shorter steep time used for green tea extract less caffeine than the hotter, longer steeps common for black tea. If you're looking to minimize caffeine, green tea is a smart choice, but note that even green tea isn't caffeine-free.

• Steep green tea at 165°F for 2 minutes to keep both flavor and caffeine moderate.

How Does Tea Caffeine Compare to Coffee?

A typical 8 oz cup of coffee contains 80–100 mg of caffeine, which is roughly 2–3 times more than a cup of black tea. This is why many people switch to tea for a gentler energy boost. The caffeine in tea is also absorbed differently because of L-theanine, an amino acid that promotes calm alertness without the jittery spike.

If you're replacing coffee, start with a robust black tea like Masala Chai, which has a bolder flavor and more caffeine than green or oolong. You can also adjust steeping time to fine-tune the strength.

• For a coffee-like kick, choose a full-leaf black tea and steep it a bit longer—just be aware that over-steeping increases bitterness.

What Affects Caffeine Levels in Tea?

Several factors influence caffeine content: tea type, leaf grade, water temperature, and steeping time. Higher temperatures and longer steeps extract more caffeine. Finely broken leaves expose more surface area, so they release caffeine faster than whole leaves.

The same tea can yield different caffeine levels depending on how you brew it. For instance, a second steep of the same leaves contains much less caffeine than the first. This is a practical way to enjoy multiple cups with less total caffeine.

• Use the recommended brewing parameters for each tea—temperature and time—to control caffeine extraction.

Is There Caffeine in Masala Chai?

Yes, Masala Chai contains caffeine because its base is black tea. The spices—cloves, cinnamon, cardamom, and ginger—don't add caffeine, but they do add flavor and potential health benefits. A typical cup of Masala Chai has the same caffeine range as other black teas, about 40–70 mg.

If you're sensitive to caffeine, you can make a decaf version by using a caffeine-free herbal base, but note that the traditional blend from Baba's Tea Co is caffeinated. For a lower-caffeine chai experience, steep for a shorter time or use less leaf.

• If you love chai but want less caffeine, consider a rooibos-based chai blend (not from this store) as an alternative.

Quick Caffeine Cheat Sheet

Black tea (e.g., Masala Chai)

40–70 mg per cup. Steep at 210°F for 2 minutes. Bold flavor and moderate caffeine. Best for a morning or early afternoon pick-me-up.

Oolong tea (e.g., Supreme Iron Goddess)

30–50 mg per cup. Steep at 185°F for 2 minutes. Balanced and smooth. A versatile midday choice.

Green tea (e.g., Dragon Well)

20–45 mg per cup. Steep at 165°F for 2 minutes. Delicate and gentle. Good for a light boost or later in the day.

Tea Options from Baba's Tea Co

• Masala Chai: A hearty blend rooted in India’s spice culture, bringing together a traditional blend of warming spices to create a rich and aromatic brew. Ingredients: Black tea, cloves, cinnamon, cardamom, ginger. Brewing: 210°F for 2 minutes. Because it's black tea-based, Masala Chai provides a moderate caffeine boost—ideal for a morning or early afternoon cup.
• Dragon Well: A classic Chinese green tea harvested in early spring to capture a softer, more delicate taste. It features a sweet vegetal profile with subtle nutty notes. Brewing: 165°F for 2 minutes. As a green tea, Dragon Well typically has less caffeine than black tea, making it a good choice for a lighter lift or later in the day.
• Supreme Iron Goddess: A lightly roasted oolong grown in the high elevation of Fujian’s Anxi mountains. Our supreme grade leaves are hand-picked from the newest sprouts of the season, giving the tea a refined and delicate flavor. Brewing: 185°F for 2 minutes. This oolong offers a middle-ground caffeine level—more than green but less than black—and its light roast makes it a smooth afternoon option.

Caffeine in tea isn't a one-size-fits-all number. By understanding the type, brewing method, and leaf grade, you can tailor your cup to your energy needs. Whether you prefer the boldness of black tea or the delicacy of green, Baba's Tea Co offers options to suit your taste and caffeine tolerance.