How Much Caffeine Is in Tea? Complete Guide by Type

Most teas contain 20 to 70 mg of caffeine per 8-ounce cup, though the range spans from zero in herbal infusions to over 80 mg in matcha and some botanical blends. The caffeine in your cup depends on tea type, brewing method, and how fresh your leaves are when you brew them.

This guide is for tea drinkers who want to understand what drives caffeine content in their favorite blends, whether you're trying to manage your daily intake, comparing tea to coffee, or simply curious why your morning black tea hits differently than your evening white. We'll walk through caffeine levels by tea type, the factors that change those numbers, and how proper storage in airtight containers or similar vessels keeps your tea performing consistently.

You'll learn:

• Caffeine ranges for black, green, white, oolong, matcha, and herbal teas
• How brewing time, water temperature, and leaf quality affect caffeine extraction
• Why fresh, properly stored tea delivers more predictable caffeine and flavor
• How tea compares to coffee and energy drinks

What Determines Caffeine Levels in Tea?

Tea caffeine isn't fixed, it's variable. The same tea brewed two different ways can deliver very different amounts of caffeine, and understanding what drives those differences helps you control your intake.

The primary factor is tea type. All true tea comes from the same plant, Camellia sinensis, but processing methods create distinct categories with different caffeine profiles. Black tea is fully oxidized, which concentrates caffeine. Green tea is minimally oxidized, leaving caffeine levels lower. White tea uses young buds and leaves, often with less caffeine than mature leaves. Oolong falls between green and black. Matcha is ground whole leaf, so you consume the entire leaf, and all its caffeine, rather than steeping and discarding it.

Herbal infusions aren't true tea at all. They're made from flowers, roots, or other botanicals, and most contain zero caffeine. The exceptions are high-caffeine plants like yerba mate and yaupon, which can exceed black tea.

Brewing method is the second major variable. Longer steep times extract more caffeine. Hotter water extracts more caffeine. A larger leaf-to-water ratio extracts more caffeine. A black tea steeped for five minutes in boiling water will deliver more caffeine than the same tea steeped for two minutes at a lower temperature.

Leaf quality and freshness matter more than most people realize. Stale tea loses volatile compounds, including some caffeine, as it degrades. Tea stored in contact with air, light, or moisture will deliver less consistent caffeine over time. This is why proper storage isn't just about flavor; it's about performance.

How Much Caffeine Is in Black Tea?

Black tea typically contains 40 to 70 mg of caffeine per 8-ounce cup, making it the highest-caffeine category among traditional steeped teas. That's roughly half the caffeine in an 8-ounce cup of drip coffee, which usually delivers 95 to 165 mg.

The range exists because black teas vary widely. A strong Assam brewed strong will hit the upper end of that range. A lighter Ceylon brewed briefly might land closer to 40 mg. Factors like leaf grade, harvest season, and whether the tea is a blend or single-origin all influence the final number.

Black tea is fully oxidized during processing, which concentrates caffeine and gives the tea its dark color and bold flavor. That oxidation also makes black tea less vulnerable to light and air than green or white teas, but it doesn't make the tea immune to degradation. Stale black tea loses the bright, brisk character that defines a good brew, and caffeine extraction becomes less predictable.

If you're drinking black tea for a reliable energy boost, consistency starts with storage. Black tea should be kept in an opaque, airtight container away from moisture and strong odors. Tea leaves are porous and will absorb whatever they're stored near, spices, coffee, even the smell of a cupboard. The Airscape® canister line removes the headspace of air that accelerates staling, which helps black tea hold its strength and flavor through the tin.

How Much Caffeine Is in Green Tea?

Green tea generally contains 20 to 45 mg of caffeine per 8-ounce cup, though some sources place the range as low as 20 to 30 mg depending on the specific tea and brewing method. That's about a third to half the caffeine in black tea, making green tea a moderate-caffeine option.

Green tea is minimally oxidized, which preserves its fresh, vegetal character and keeps caffeine levels lower than black tea. The specific caffeine content depends on the tea's origin, the age of the leaves, and how it's brewed. Japanese green teas like sencha and gyokuro can be higher in caffeine than Chinese green teas like dragonwell, and shaded teas tend to be higher than unshaded ones.

Green tea is more delicate than black tea in every way. It's more vulnerable to light, which dulls its bright green color and fresh flavor. It's more vulnerable to oxygen, which flattens the aroma. And it's more vulnerable to odor absorption, green tea stored next to a strong spice or coffee will taste like that spice or coffee.

For green tea, proper storage isn't optional. An opaque container is better than clear glass unless you're storing the tea in a cupboard. An airtight seal is better than a loose lid. And removing the air from the container, rather than just sealing it in, is better still. The Airscape® valve system presses an inner lid directly onto the tea, forcing air out through a one-way valve. That active removal of oxygen helps green tea hold its fresh character longer, which means more consistent flavor and caffeine from the first cup to the last.

How Much Caffeine Is in White Tea?

White tea contains roughly 15 to 30 mg of caffeine per 8-ounce cup, making it one of the lowest-caffeine true teas. Some sources place the range as low as 15 to 25 mg, depending on the specific tea and brewing method.

White tea is made from young buds and leaves, harvested early and minimally processed. The lack of oxidation preserves a delicate, subtly sweet flavor and keeps caffeine levels low. White tea is often brewed at lower temperatures and for shorter times than black or green tea, which further reduces caffeine extraction.

Because white tea is so lightly processed, it's also the most fragile. Light exposure degrades the delicate flavors quickly. Oxygen flattens the aroma. Moisture can spoil the leaves. And white tea will absorb odors faster than any other tea type, store it near coffee or spices and you'll taste them in your cup.

White tea deserves the same care you'd give a good wine. Store it in an opaque, airtight container in a cool, dry place. If you're buying white tea in quantity, consider storing each tea separately to prevent cross-contamination of flavors. The Airscape® ceramic canister is a natural fit for white tea, opaque, non-porous, and sized for a single tea rather than a bulk blend.

How Much Caffeine Is in Oolong Tea?

Oolong tea typically contains 30 to 60 mg of caffeine per 8-ounce cup, placing it between green and black tea. Some sources narrow the range to 30 to 50 mg, depending on the specific oolong and how it's brewed.

Oolong is partially oxidized, which gives it characteristics of both green and black tea. Lighter oolongs, oxidized less, lean toward green tea in flavor and caffeine. Darker oolongs, oxidized more, approach black tea. The caffeine content reflects that spectrum.

Oolong is often brewed multiple times from the same leaves, which changes the caffeine profile. The first steep extracts the most caffeine. Subsequent steeps extract less, though they often reveal different flavor notes. If you're drinking oolong for a specific caffeine target, the first steep is the one that matters.

Oolong storage follows the same principles as green and black tea: keep it dry, keep it dark, and keep it away from strong odors. Oolong leaves are often rolled or twisted, which makes them slightly less fragile than flat green tea leaves, but they're still vulnerable to oxygen and light. An airtight container with minimal headspace will keep your oolong performing consistently from the first brew to the last.

How Much Caffeine Is in Matcha?

Matcha contains roughly 60 to 80 mg of caffeine per 8-ounce serving, though some sources place the range as wide as 38 to 89 mg depending on the grade and preparation. That's higher than steeped green tea and closer to black tea or even coffee.

The difference is preparation. Matcha is ground whole leaf, whisked into water rather than steeped and discarded. You consume the entire leaf, which means you consume all the caffeine in that leaf. A typical serving uses about one teaspoon of matcha powder, and the caffeine in that teaspoon is higher than what you'd extract from the same amount of leaf steeped in water.

Matcha is also shaded before harvest, which increases chlorophyll and caffeine content. The combination of shading and whole-leaf consumption makes matcha the highest-caffeine tea option for most people.

Matcha is extremely vulnerable to oxidation and light. The fine powder has far more surface area than whole leaves, which accelerates degradation. Matcha that's been exposed to air or light will lose its vibrant green color, turn dull or yellowish, and develop a bitter, stale flavor. Caffeine content may drop as well.

Proper matcha storage is non-negotiable. Store it in an opaque, airtight container in a cool, dry place, or even in the refrigerator if you're keeping it long-term. The Airscape® valve system works well for matcha because it removes the headspace of oxygen that accelerates oxidation, and the opaque stainless or ceramic options block light completely.

How Much Caffeine Is in Herbal Tea?

Most herbal teas contain zero caffeine. Herbal infusions aren't true tea, they're made from flowers, roots, leaves, or bark from plants other than Camellia sinensis. Chamomile, peppermint, rooibos, hibiscus, and most other herbal blends are naturally caffeine-free.

The exceptions are botanical plants that naturally contain caffeine. Yerba mate, a South American holly, contains roughly 85 mg of caffeine per 8-ounce cup, higher than black tea and comparable to coffee. Yaupon, a North American holly, contains around 60 mg per cup. Guayusa, another South American plant, is similarly high.

If you're drinking herbal tea specifically to avoid caffeine, check the label or ingredient list. Most herbal blends are caffeine-free, but some are formulated with added caffeine or include high-caffeine botanicals like yerba mate.

Herbal teas are as vulnerable to odor absorption as true teas, and some, like chamomile and peppermint, have delicate flavors that degrade quickly when exposed to air or light. Store herbal teas in airtight containers, and if you're storing multiple herbals, keep them separate to prevent flavor cross-contamination.

How Does Tea Compare to Coffee and Energy Drinks?

An 8-ounce cup of brewed coffee typically contains 95 to 165 mg of caffeine, roughly double to triple the amount in most teas. Black tea comes closest at 40 to 70 mg per cup, while green tea delivers 20 to 45 mg. Even high-caffeine options like matcha (60 to 80 mg) or yerba mate (85 mg) fall short of coffee's upper range.

Energy drinks vary widely. An 8-ounce serving of a typical energy drink contains 70 to 100 mg of caffeine, comparable to black tea or matcha. Larger servings, 12 or 16 ounces, can deliver 150 to 300 mg or more, well beyond what you'd get from tea.

The difference isn't just quantity. Tea delivers caffeine alongside L-theanine, an amino acid that promotes calm focus and moderates caffeine's jittery edge. Coffee and energy drinks don't contain L-theanine, which is why tea's energy boost often feels smoother and less likely to cause a crash.

If you're managing caffeine intake, tea offers more control. You can adjust steep time, water temperature, and leaf quantity to fine-tune the amount you extract. You can choose a low-caffeine white tea for the afternoon or a high-caffeine matcha for the morning. Coffee and energy drinks offer less flexibility, you get what's in the cup.

What Affects Caffeine Extraction When Brewing Tea?

Steep time is the single biggest variable you control. Caffeine extracts quickly in the first minute or two, then continues to extract more slowly over time. A black tea steeped for five minutes will deliver significantly more caffeine than the same tea steeped for two minutes. If you want less caffeine, steep briefly. If you want more, steep longer.

Water temperature matters as well. Hotter water extracts caffeine faster and more completely. Black tea is typically brewed at or near boiling (200 to 212°F), which maximizes caffeine extraction. Green tea is often brewed at lower temperatures (160 to 180°F), which reduces caffeine extraction and preserves delicate flavors. If you're brewing green tea at black tea temperatures, you'll extract more caffeine, but you may also extract bitterness.

Leaf quantity affects caffeine as well. More leaves mean more caffeine. A heaping teaspoon of tea will deliver more caffeine than a level teaspoon. If you're brewing loose leaf, measure consistently to get predictable results.

Leaf quality and freshness are the variables you can't adjust at brew time, they're determined by how you store your tea. Fresh tea extracts more predictably than stale tea. Tea stored in contact with air, light, or moisture will degrade over time, losing volatile compounds and delivering less consistent caffeine. Proper storage, opaque, airtight, and with minimal headspace, keeps your tea performing the way it should from the first cup to the last.

How Should You Store Tea to Preserve Caffeine and Flavor?

Tea's enemies are oxygen, light, moisture, heat, and odor. All five accelerate degradation, and all five are preventable with proper storage.

Oxygen flattens aroma and dulls flavor, particularly in green and white teas. Most airtight containers trap a headspace of oxygen against the tea, which continues to degrade the leaves over time. A better approach is to remove that headspace entirely. The Airscape® valve system uses a two-lid design: the outer lid seals the container, and the inner lid descends directly onto the tea, forcing air out through a one-way valve as it goes. That active removal of oxygen, rather than passive sealing, helps tea hold its character longer.

Light degrades tea, especially green and white varieties. Store tea in an opaque container, not clear glass, unless the container lives in a cupboard. The Airscape® ceramic and stainless steel canisters block light completely, making them better countertop options than glass.

Moisture spoils tea. Keep tea dry, always. Never store tea in a humid environment, and never introduce moisture into the container. This is not cannabis, tea should be kept bone-dry.

Heat accelerates all the above. Store tea in a cool place, away from the stove or direct sunlight.

Odor absorption is tea's defining vulnerability. Dry tea leaves are porous and will take on whatever they're stored near, coffee, spices, even the smell of a cupboard. Store tea in a non-porous container, and store each tea separately if you're keeping multiple varieties. A canister that held coffee will scent your tea unless it's been thoroughly cleaned. The Airscape® stainless and ceramic options are non-porous and won't retain odors the way plastic can.

For loose-leaf tea, one canister per tea is genuinely correct advice, not an upsell. Strong teas will scent delicate ones through a shared container, and the flavor cross-contamination is real. If you're storing a collection of teas, plan for a collection of canisters.

Does Tea Lose Caffeine Over Time?

Tea doesn't lose caffeine in the sense that the caffeine molecule disappears, but stale tea extracts less predictably and may deliver less caffeine per cup than fresh tea. The caffeine is still in the leaf, but degraded leaves don't release their compounds as readily during brewing.

What you lose more noticeably is flavor and aroma. Volatile compounds break down when tea is exposed to oxygen, light, or moisture, and those compounds are what make tea taste good. Stale tea tastes flat, dull, or even off. The caffeine may still be there, but the experience of drinking it won't be.

Proper storage slows that degradation. An airtight container with minimal headspace keeps oxygen away from the leaves. An opaque container keeps light away. A cool, dry location keeps heat and moisture away. Together, those conditions help tea hold its flavor, aroma, and performance longer.

If you're buying tea in quantity, store it properly from the start. Don't wait until the tea tastes stale to move it to a better container. The Airscape® valve system is designed for this, active air removal, not passive sealing, which means the tea you brew six months from now will taste closer to the tea you brewed on day one.

Can You Adjust Caffeine Levels by Rinsing Tea Leaves?

Some tea drinkers rinse their leaves with hot water for a few seconds before brewing, then discard that rinse and brew the leaves normally. The idea is that caffeine extracts quickly, so a brief rinse removes some caffeine while leaving most of the flavor intact.

The evidence for this is mixed. Caffeine does extract quickly, but so do many flavor compounds. A rinse will reduce caffeine, but it will also reduce flavor, aroma, and body. You'll get a lighter cup in every sense.

If you want less caffeine, a more reliable approach is to choose a lower-caffeine tea type, brew at a lower temperature, or steep for less time. Those methods give you more control over the final result without sacrificing flavor unnecessarily.

A rinse does serve one useful purpose: it can remove dust or small particles from loose-leaf tea, particularly if the tea has been stored for a while. But if your tea is fresh and properly stored, a rinse isn't necessary for cleanliness or caffeine reduction.

How Do You Choose the Right Tea for Your Caffeine Needs?

If you want high caffeine, choose matcha, black tea, or yerba mate. Matcha delivers 60 to 80 mg per serving, black tea delivers 40 to 70 mg, and yerba mate delivers around 85 mg. Brew with boiling water and steep for the full recommended time to maximize extraction.

If you want moderate caffeine, choose oolong or green tea. Oolong delivers 30 to 60 mg per cup, green tea delivers 20 to 45 mg. You can adjust caffeine within those ranges by varying steep time and water temperature.

If you want low caffeine, choose white tea at 15 to 30 mg per cup. White tea is also the most delicate in flavor, making it a good choice for afternoon or evening drinking when you want something light.

If you want zero caffeine, choose herbal infusions like chamomile, peppermint, or rooibos. Check the label to confirm there are no added caffeine sources or high-caffeine botanicals like yerba mate.

Once you've chosen your tea, store it properly to keep it performing consistently. Fresh tea extracts more predictably, tastes better, and delivers the caffeine you expect. The Airscape® canister line is built for this, opaque options for light-sensitive teas, non-porous materials that won't absorb or transfer odors, and a valve system that removes the headspace of oxygen rather than sealing it in. One canister per tea, stored in a cool, dry place, and your tea will hold its strength and flavor from the first cup to the last.

Frequently Asked Questions

Does steeping tea longer increase caffeine? Yes. Caffeine extracts quickly in the first minute or two, then continues to extract more slowly over time. A longer steep delivers more caffeine, but it also extracts more tannins, which can make the tea taste bitter. If you want more caffeine without bitterness, use more leaves rather than steeping longer.

Is matcha higher in caffeine than regular green tea? Yes. Matcha contains 60 to 80 mg of caffeine per serving, compared to 20 to 45 mg in steeped green tea. The difference is preparation, matcha is ground whole leaf, so you consume all the caffeine in the leaf rather than just what extracts during steeping.

Can you store different teas in the same container? You shouldn't. Tea leaves are porous and absorb odors readily. Strong teas will scent delicate ones through a shared container, and the flavor cross-contamination is real. Store each tea separately in its own airtight, opaque container for the best results.

Does tea have more caffeine than coffee? No. An 8-ounce cup of brewed coffee typically contains 95 to 165 mg of caffeine, while most teas range from 20 to 70 mg. Even high-caffeine teas like matcha (60 to 80 mg) or yerba mate (85 mg) fall short of coffee's upper range.

How long does tea stay fresh in an airtight container? Properly stored tea can hold its flavor and caffeine for six months to a year, though fresher is always better. The key is removing oxygen, blocking light, and keeping the tea dry. An airtight container with minimal headspace, like the Airscape® valve system, helps tea stay fresh longer by actively removing the air that accelerates degradation.

Keep Your Tea Fresh and Consistent

Caffeine content in tea is variable, but it doesn't have to be unpredictable. The tea type you choose, the way you brew it, and how you store it all shape the caffeine in your cup. Black tea delivers the most among steeped teas, matcha delivers the most overall, and herbal infusions deliver none, unless they're high-caffeine botanicals like yerba mate.

Proper storage keeps your tea performing the way it should. Oxygen, light, moisture, and odors all degrade tea, and all are preventable with the right container. The Airscape® canister line removes the headspace of oxygen that accelerates staling, blocks light with opaque stainless and ceramic options, and uses non-porous materials that won't absorb or transfer odors. One canister per tea, stored in a cool, dry place, and your tea will deliver consistent flavor and caffeine from the first cup to the last.

Browse the full Airscape® collection and find the right storage solution for your tea. Whether you're keeping a single favorite or a full collection, we've built the canisters to match.