How Much Caffeine Does Tea Have Compared with Coffee?

Tea and coffee are two of the most popular drinks in the world, and caffeine is a big part of why. Whether you reach for a cup of tea or a cup of coffee as part of your daily routine, understanding how much caffeine you are actually consuming can help you make informed choices about your intake.

The short answer: coffee generally contains more caffeine per cup than tea. But the full picture is more nuanced than that. The caffeine levels in your drink depend on the type of tea or coffee, the preparation method, brewing time, water temperature, and serving size. Tea also contains a unique compound – L-theanine – that fundamentally changes how its caffeine affects the body.

In this guide, we break down the caffeine content of various teas and coffees, explain what influences those numbers, and help you decide which drink suits your needs.

Why Does Caffeine Matter?

Caffeine is a natural stimulant found in over 60 plant species, including the Camellia sinensis tea plant and the Coffea plant that produces coffee beans. It is also present in chocolate, energy drinks, and some medications – making it one of the most widely consumed substances on earth.

Caffeine works by stimulating the central nervous system, which is why it helps you stay alert, reduces fatigue, and can improve mental alertness and concentration. Scientific evidence also links moderate caffeine consumption to improved athletic performance, elevated mood, and a modest boost to metabolic rate.

However, too much caffeine can cause restlessness, anxiety, disrupted sleep, headaches, and a fast heartbeat. Most health authorities recommend keeping daily intake below 400 mg for healthy adults (roughly four cups of brewed coffee), while pregnant women are advised to limit consumption to 200 mg per day.

Caffeine in Tea

All true teas – including green, black, white, and oolong tea – come from the same plant, Camellia sinensis. This means all true teas contain caffeine, though the amount varies depending on various factors including leaf grade, processing, and how the tea is brewed.

Here is a general guide to caffeine levels per standard 237 ml (8 oz) cup:

• Black tea: 47-90 mg
• Oolong tea: 30-50 mg
• Green tea: 20-45 mg
• White tea: 6-60 mg
• Matcha (1g serving): 30-45 mg
• Pu’erh tea: 30-70 mg
• Yerba mate: approximately 85 mg
• Herbal tea: 0 mg (caffeine-free)

A few things worth noting:

Leaf grade matters. Teas made from young buds and tips (such as Silver Needle white tea or Jin Jun Mei black tea) generally contain more caffeine than those made from larger, more mature leaves. This is because the tea plant concentrates caffeine in its newest growth as a natural defence against insects.

Processing is not the main driver. It is a common misconception that black tea always has the most caffeine because it is the most oxidised. In reality, oxidation changes flavour and colour more than it changes caffeine content. A high-grade green tea can contain a similar caffeine content to a lower-grade black tea.

Pu’erh is unique. Because pu’erh tea undergoes microbial fermentation and is often aged for years, its caffeine content tends to decrease over time. A well-aged pu’erh may contain noticeably less caffeine than a younger tea.

Herbal teas are caffeine-free. Herbal infusions such as chamomile, peppermint, and rooibos are not made from the Camellia sinensis plant and contain no caffeine at all, making them an excellent option for those looking to avoid caffeine altogether.

How Tea Brewing Affects Caffeine

The preparation method has a significant impact on how much caffeine ends up in your cup of tea. The key variables are:

• Brewing time: Longer steeping extracts more caffeine. A black tea steeped for one minute may yield around 40 mg, while three minutes can produce 60 mg or more.
• Water temperature: Hotter water extracts caffeine more efficiently. This is one reason black tea (brewed at 90-100°C) tends to deliver more caffeine per cup than green tea (typically brewed at 70-80°C).
• Leaf-to-water ratio: Using more tea leaves relative to water naturally increases caffeine per cup.
• Number of infusions: When brewing Gong Fu style with multiple short steeps, the first infusion extracts the most caffeine. Each subsequent infusion contains progressively less, meaning your later cups are gentler.

For most teas, a standard Western-style brew of 2-3 minutes at the appropriate temperature will keep caffeine moderate. For detailed guidance, see our Chinese tea brewing guide.

Caffeine in Coffee

Coffee generally delivers more caffeine than tea – primarily because the brewing process uses hotter water, more ground coffee per serving, and longer extraction times. While tea leaves actually contain more caffeine by dry weight than coffee beans, the average cup of coffee ends up stronger.

Here is a guide to caffeine content per serving:

• Brewed (drip/filter) coffee (237 ml): 95-200 mg
• French press coffee (237 ml): 80-135 mg
• Instant coffee (237 ml): 60-80 mg
• Cold brew coffee (237 ml): 100-200 mg
• Espresso (30 ml single shot): approximately 58-65 mg
• Latte/cappuccino (double shot): approximately 116-130 mg
• Decaffeinated coffee (237 ml): 0-3 mg

How Coffee Brewing Affects Caffeine

As with tea, brewing variables make a significant difference:

• Grind size: Finer grinds expose more surface area, leading to greater caffeine extraction. Espresso uses a very fine grind, which is why it is so concentrated despite its small serving size.
• Water temperature: Most hot coffee is brewed at 90-96°C. Higher temperatures extract more caffeine content in less time.
• Brewing time: A French press steeps for 3-4 minutes, drip takes 3-5 minutes, and cold brew soaks for 8-24 hours. Cold brew uses the same amount of time that hot methods use temperature – the extended contact compensates for the lower heat.
• Coffee-to-water ratio: Cold brew typically uses 1.5 times more ground coffee than hot methods, which is why it often produces more caffeine per serving.

One common misconception: dark roast coffee does not contain more caffeine than light roast. Roasting affects flavour but has minimal impact on caffeine levels. However, because dark roasts are less dense, you may use slightly more grounds by volume, which can result in a marginally more caffeinated cup.

The L-Theanine Factor: Why Tea Caffeine Feels Different

One of the most important differences between tea and coffee is not the amount of caffeine – it is how that caffeine is experienced.

Tea contains L-theanine, an amino acid found almost exclusively in the Camellia sinensis plant. L-theanine promotes alpha brain wave activity, which is associated with a state of calm, focused attention. When consumed alongside caffeine, it produces a distinctive effect: steady, clear-headed energy without the jitteriness, anxiety, or crash that coffee or high caffeine drinks can sometimes cause.

This is why many tea drinkers describe the caffeine boost from tea as “smooth” or “sustained” compared to coffee’s sharper spike and subsequent dip. It is also why tea has been the beverage of choice for Buddhist monks seeking concentration during meditation, and why it remains a favourite among people who want mental alertness without overstimulation.

For those considering switching from coffee to tea, this difference in how caffeine affects the body is often the most compelling factor.

Tea vs Coffee: A Quick Comparison

Which One Should You Choose?

The choice between coffee or tea comes down to personal preference, caffeine tolerance, and what you are looking for from your drink:

• For a gentle, sustained caffeine boost: Green or oolong tea provides moderate caffeine with the calming influence of L-theanine.
• For maximum alertness: Espresso and cold brew coffee deliver the highest caffeine doses among common beverages.
• For varying levels of caffeine: Tea offers the widest range – from high caffeine tea like matcha and strong black teas down to naturally caffeine-free herbals. This makes it easy to adjust your intake throughout the day.
• For caffeine-sensitive individuals: White tea, lightly brewed green tea, or herbal infusions are gentle options. Aged pu’erh is another good choice, as its caffeine content diminishes with age.
• During pregnancy: Both tea and coffee should be limited to keep total caffeine consumption below 200 mg daily.

Frequently Asked Questions

Which tea has the most caffeine?

Among commonly consumed teas, matcha typically has the highest caffeine per serving because you consume the entire ground tea leaf rather than steeping and discarding it. Among steeped teas, young-bud black teas and high-grade green teas tend to be highest. For a wider overview of tea types and their characteristics, see our guide to the types of Chinese tea.

Can I reduce the caffeine in my tea?

Yes. Brewing for a shorter time, using slightly cooler water, and choosing teas made from more mature leaves will all reduce caffeine. If you are brewing Gong Fu style, the first infusion contains the most caffeine – so discarding the first quick steep (a common practice called “rinsing”) will also lower the caffeine in subsequent cups.

Is decaf tea truly caffeine-free?

Not entirely. Decaffeinated tea typically retains trace amounts of caffeine (1-5 mg per cup). For a completely caffeine-free option, choose herbal teas such as chamomile, rooibos, or peppermint, which are not made from the Camellia sinensis plant and naturally contain zero caffeine.

How long does caffeine stay in your system?

Caffeine affects the body within 20-60 minutes of consumption, and its half-life is approximately 5-6 hours – meaning half the caffeine from your afternoon cup is still in your system at bedtime. If sleep is a concern, most experts recommend avoiding caffeinated beverages at least 4-6 hours before bed.

The Bottom Line

Both tea and coffee are excellent sources of caffeine, but they deliver it in fundamentally different ways. Coffee provides a stronger, more immediate hit, while tea offers a smoother, more sustained experience thanks to the unique combination of caffeine and L-theanine.

Understanding the health effects of caffeine and how brewing choices influence your intake empowers you to enjoy both beverages mindfully. Whether you prefer the bold intensity of espresso or the refined calm of a carefully brewed loose leaf tea, the key is consistency and moderation.

Explore our Chinese tea collection to discover premium loose leaf teas across every caffeine level – from invigorating black teas to gentle whites and naturally caffeine-free options – all dispatched from Melbourne within one business day.