Tea generally contains 30 to 50 milligrams of caffeine per cup, roughly half the amount found in the same volume of coffee. But if you want the full answer to how much caffeine is in tea compared to coffee, the numbers shift a lot based on the type of leaf, the roast of the bean, and how long you steep or brew. This guide breaks it all down so you can pick the right drink for your day.
Below you will find clear ranges, side by side comparisons, and simple tips to control your caffeine intake at home.
Quick Answer: Tea Vs Coffee Caffeine Per Cup
Here is the short version before we get into the details.
- Black tea (8 oz): 40 to 70 mg
- Green tea (8 oz): 20 to 45 mg
- White tea (8 oz): 15 to 30 mg
- Oolong tea (8 oz): 30 to 55 mg
- Brewed coffee (8 oz): 95 to 165 mg
- Espresso (1 oz shot): 47 to 75 mg
- Instant coffee (8 oz): 30 to 90 mg
- Decaf coffee (8 oz): 2 to 5 mg
So on average, a cup of tea has about half the caffeine of the same size cup of coffee. But that gap narrows fast with strong coffee or weak tea.
How Much Caffeine Is In Tea Compared To Coffee
This section gives you the exact numbers side by side. The key point is that volume and brewing method matter more than most people think.
Black Tea Vs Brewed Coffee
Black tea is the strongest common tea. One 8 ounce cup has 40 to 70 mg. A same size cup of drip coffee has 95 to 165 mg. So coffee wins by roughly two to one.
If you drink a 16 oz mug of each, tea gives you 80 to 140 mg and coffee gives you 190 to 330 mg. That is a big difference.
Green Tea Vs Coffee
Green tea is lighter. You get 20 to 45 mg per 8 oz cup. Coffee gives you 95 to 165 mg. So green tea has about one quarter to one third the caffeine of coffee.
Many people drink green tea in the afternoon because it is gentle and less likely to keep you up at night.
Espresso Vs Tea
Espresso is tricky. A single 1 oz shot has 47 to 75 mg. That is close to a cup of black tea. But you rarely drink just one ounce of tea. If you sip a 12 oz latte with two shots, you get 94 to 150 mg. That is more than most teas.
Herbal Tea Vs Coffee
Herbal teas like chamomile, peppermint, and rooibos have zero caffeine. So compared to coffee, they have none at all. If you want flavor without the buzz, this is your best pick.
What Changes The Caffeine Level In Your Cup
Two cups of the same drink can have very different caffeine. Here is what moves the number up or down.
For Tea
- Leaf type: black > oolong > green > white
- Steep time: longer steeping pulls out more caffeine
- Water temp: hotter water extracts caffeine faster
- Leaf amount: more leaves means more caffeine
- Bag vs loose: loose leaf often brews stronger
For Coffee
- Roast level: dark roast has slightly less caffeine by weight, but scoops vary
- Brew method: drip > pour over > cold brew (per ounce)
- Coffee to water ratio: more grounds means more caffeine
- Grind size: finer grind extracts more caffeine
- Cup size: a 20 oz coffee can hit 400 mg fast
How To Control Your Caffeine Intake
You do not need to guess. Use these simple steps to keep your daily caffeine in a safe range.
- Check the label or ask the barista for the caffeine amount per serving.
- Measure your tea leaves or coffee grounds with a scale for the first week.
- Shorten your tea steep time to 2 minutes if you want less caffeine.
- Use a smaller mug. An 8 oz cup is the standard for a reason.
- Switch to decaf after 2 PM if you are sensitive to caffeine.
- Drink water between caffeinated drinks to stay hydrated.
Most adults can have up to 400 mg of caffeine per day. That is about 4 cups of coffee or 6 to 8 cups of black tea. Pregnant women should stay under 200 mg per day.
Tea Caffeine Vs Coffee Caffeine: Which Is Better For You
Neither is bad. It depends on what you want.
- Want a big energy jolt? Coffee works faster and stronger.
- Want a slow, steady lift? Tea gives you a gentler curve.
- Want to avoid the jitters? Tea is less likely to cause them.
- Want antioxidants? Both have them, but tea has more of certain types.
- Want to sleep well? Tea, especially green or white, is easier on sleep.
Tea also contains L-theanine, an amino acid that can smooth out the caffeine buzz. Coffee does not have this. That is why many people feel calm and focused after tea but wired after coffee.
Common Mistakes When Comparing Caffeine In Tea And Coffee
People often get confused by these three things.
Mistake 1: Comparing By Volume, Not By Cup Size
A teacup is often 6 oz. A coffee mug is often 12 oz. So a “cup” of coffee can have four times the caffeine of a “cup” of tea, not just two times.
Mistake 2: Assuming All Tea Is Weak
Matcha is a green tea powder. One 8 oz cup can have 60 to 80 mg of caffeine. That is close to a weak coffee. So do not assume tea is always low.
Mistake 3: Trusting The Color
Dark tea is not always stronger than light tea. A white tea steeped for 5 minutes can have more caffeine than a black tea steeped for 1 minute. Time and temp matter more than color.
Final Takeaway
Tea has about half the caffeine of coffee per same size cup. Black tea lands at 40 to 70 mg. Coffee lands at 95 to 165 mg. Green and white tea are even lower. Herbal tea has none.
If you want a strong lift, pick coffee. If you want a mild lift without the jitters, pick tea. And if you want full control, measure your leaves, watch your steep time, and keep your mug size in check. That is the simple truth behind how much caffeine is in tea compared to coffee.