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I’ve ordered McDonald’s Sweet Tea enough times that I started thinking about it less as a sugary side drink and more as a caffeine question.
Whenever I pass a McDonald’s drive-thru, that sweet tea flavor is what comes to mind first.
After a few refreshing gulps the other day, I realized I had never checked the caffeine.
I had not been sleeping well for several days, so it felt like a practical time to see whether the tea was part of the problem.
Caffeine levels of McDonald's Sweet Tea (Sizes explained)
McDonald’s Sweet Tea comes in four sizes, and once I started comparing them, the caffeine gap was easier to notice.
I usually stick with Extra Small or Small because I do not want much sugar in one cup. A former McDonald’s employee friend told me Medium is the size they saw ordered most often.
Now I will break down the caffeine content in each size to help you fit sweet tea in the recommended 400 milligrams of caffeine a day.
I treat these caffeine figures as ballpark numbers because the exact amount can shift from one drink to the next.
In Extra Small Sweet Tea – 25 mg of caffeine
When you opt for the extra small size, you’ll be sipping on a petite portion of McDonald’s sweet tea, which typically contains around 25 milligrams of caffeine per 8-ounce serving.
That still feels lighter to me than a single espresso shot, so I read it as less of a coffee-style hit.
In a Small Sweet Tea – 50 mg of caffeine
A small McDonald’s Sweet Iced Tea is twice as big as the extra small size and thus has twice as much caffeine – around 50 mg.
It’s not a huge amount of caffeine, but it’s closer to one espresso shot or Lipton Black tea leaves. The half-life of caffeine in healthy adults is about 5 hours.
For me, 50 mg can be enough to keep me awake if I drink it an hour or two before bed.
In a Medium Sweet Tea – 65 mg of caffeine
If I want a little more caffeine and do not mind the sugar, Medium is the size I notice most.
You will find around 65 milligrams of caffeine in a 21-ounce cup of McDonald’s sweet tea.
It sits in roughly the range of a single espresso shot, so I treat it as something that can stick around for several hours.
In a Large Sweet Tea – 100 mg of caffeine
I’ve never been able to finish a Large McDonalds Sweet Tea, not because of the 100 mg of caffeine it contains, but because 32 fl oz cup is just too much liquid and sugar for me.
That is enough caffeine that I mentally file Large with coffee, not with a truly light soft drink.
Still, it fits into a normal caffeine budget if I keep track of the rest of the day.
What’s in McDonald’s Sweet Tea? (Is it healthy?)
McDonald’s Sweet Tea is exactly what the name suggests: tea with sugar.
The sweetness is the main thing I notice, so I treat it as an occasional drink rather than something I sip all day.
If you drink it every day or every other day, you will expose your pancreas and all other organs to a vast amount of simple sugar that is detrimental to your health.
Ingredients
It does not rely on extra flavorings, which keeps the tea flavor straightforward.
Nutrition Info
Most of what shows up in the nutrition panel comes from added sugar.
The tea, water, and ice add almost no calories, and the drink is not a meaningful source of fiber, vitamins, or fat.
This is the sugar and calorie content of McDonald’s Sweet Tea by size:
McDonald’s Southern Style Sweet Tea has even more sugar, so I would treat it as the sweeter option.
How much caffeine is in McDonald's Sweet Tea vs other drinks
I use Medium as my benchmark when I compare it with other caffeinated drinks.
Black and Green Tea
McDonald’s does not publish caffeine amounts for its sweet tea, so comparing it with a large black or green tea depends on the serving size and brewing strength.
A medium sweet tea is sometimes estimated at around 65 milligrams of caffeine, but McDonald’s does not publish an official figure. Caffeine in brewed green and black tea also varies substantially with the tea, serving size, and brewing method, so fixed ranges such as 80 to 90 milligrams for green tea or more than 100 milligrams for black tea should not be treated as typical for every cup.
Coffee
Coffee still wins on caffeine if you compare cup for cup.
Most people are not drinking 21 ounces of coffee the way they would sweet tea, so the comparison that sticks with me is a medium sweet tea around a single espresso shot.
Energy drinks
Energy drinks are usually stronger.
The caffeine level changes a lot by brand, so one 8.4-ounce can of Red Bull contains 80 mg while Bang Energy can reach 300 mg per 16-ounce can.
In practice, energy drinks feel much more forceful to me than sweet tea.
How is McDonalds’ Sweet Tea Made? (In-store)
When it is made in-store, the process is straightforward.
It starts with brewing tea in batches.
Once brewed, it is cooled and the sugar is mixed in thoroughly so the sweetness is even.
Then they add one pound of sugar per gallon of tea, according to the ex-manager. The sweetened tea is mixed thoroughly, and that’s it – ready for you to enjoy.
Tips when ordering Sweet Tea at McDonald’s
- 1You can't customize it much since McDonald's Sweet Iced Tea is a very simple drink. However, if, for some reason, you want it to be even sweeter, you can ask for it.
- 2Also, sweet tea served with extra ice is always a good option on a scorching day. Of course, if you have a sensitive throat, you can remove ice, too. I do it all the time.
- 3Another tip I can give you is to pair sweet tea with a burger, fries, or even a delicious apple pie if you need an extra-sugar boost before the gym.
- 4If you travel, remember that there could be minor differences elsewhere based on regional preferences or seasonal availability, so ask the employees to tell you the info.
FAQs
Can I get McDonald’s Tea unsweetened?
Yes, McDonald’s also offers unsweetened tea. I reach for that version when I want tea flavor without the sugar.
Is McDonald’s Sweet Tea vegan?
McDonald’s Sweet Iced Tea appears to contain no animal-derived ingredients based on its listed ingredients, but McDonald’s USA does not certify or promote its menu items as vegan.
Is sweet tea okay during pregnancy?
During pregnancy, I would keep sweet tea in the check-with-your-doctor category for any caffeinated drink. It has both caffeine and sugar, so I would not treat it as a default choice.
Will drinking McDonald’s sweet tea at night keep me awake?
When I am sensitive to caffeine or already sleeping badly, I notice sweet tea is easier for me earlier in the day, even if it feels milder than coffee. If I want something later, I switch to herbal tea.
Can I order McDonald’s Sweet Tea online or through a mobile app?
I can order McDonald’s Sweet Tea online or in the app without much fuss, which helps when I want the same size every time and do not want to guess at caffeine or sugar.
Conclusion
It is not a caffeine powerhouse like espresso or an energy drink, but it is not caffeine-free either.
The larger sizes still carry enough caffeine and sugar that they can feel like a quick lift followed by a dip later.
If I am being careful about caffeine, I keep the portion smaller and avoid it late in the afternoon or evening.
