The 10 Most Caffeinated Diet Drinks


Did you know that diet sodas have more caffeine than regular soda?

Diet Coke has 46.5mg caffeine compared to regular Coke that has 34.5mg. That’s a thirty per-cent increase!

Here are the 10 most caffeinated diet soft drinks – and they are nowhere near the levels of caffeine in Starbucks drinks.


Diet Pepsi Max

Per 12oz can : 69mg caffeine

A can of regular Pepsi-cola contains 38mg caffeine.


Diet Sundrop

Per 12oz can: 69mg caffeine

Sun Drop is a brand of citrus soda drink from Cadbury-Schweppes. The level of caffeine in the Diet version came as a complete surprise – but then – even the regular version has 63mg in a 12oz can. Note: regular can displayed.


Diet Mountain Dew

Per 12oz can: 55mg caffeine

Mountain Dew is one of the most popular citrus soft drinks. Both diet and regular have the same amount of caffeine. In countries outside the USA – Mountain Dew has either reduced amounts of caffeine (or no caffeine at all).


Pepsi ONE

Per 12oz can: 54mg caffeine

Pepsi ONE is a very similar formulation to Diet Coke with Splenda – although Pepsi ONE contains significantly more caffeine.


Diet Cheerwine

Per 12oz can: 48.1mg caffeine


Diet RC Cola

Per 12oz can: 47.3mg caffeine

Royal Crown (RC) colas have been around for a long time and are currently owned by Cadbury Schweppes. As in the case of Diet Coke – here the diet version has more caffeine than the regular RC Cola. 2



Per 12oz can: 46.5mg caffeine

TaB (from Coca-cola) is one of the oldest diet or sugar-free soft drinks around. It has more caffeine than Diet Coke


Diet Coke

Per 12oz can: 46.5mg caffeine

Diet Coke has significantly more caffeine in it than regular coke (34.5mg).


Diet Sunkist Orange Soda

Per 12oz can: 41.5mg caffeine

Contains slightly more than the regular version of Sunkist. Who would have thought that Orange Soda was caffeinated?


Diet Dr Pepper

Per 12oz can: 41mg caffeine

Contains the same amount as regular Dr Pepper.

How Much Caffeine in Instant Coffee?


According the USDA – 1 rounded teaspoon of instant coffee powder contains 57mg of caffeine. (source).

What about Diet Coke Plus?
The vitamin-filled Diet Coke Plus contains the same amount of caffeine as Diet Coke.

Diet Pepsi?
Didn’t even make it to this list. Diet Pepsi has 36mg caffeine in a 12oz can.

Sources: The CaffeineInformer caffeine database and caffeine in citrus soda, along with PepsiCo, Coca-cola, Sundrop.


Comments now closed
  1. Cheri

    I’m gonna go back to Dt. Dr. Pepper. It has the last of the caffeine. Other than my one cup of coffee in the morning.

  2. Greg

    160z mountain dew cans have 79mg of caffeine in it. Not bad

  3. Owen

    Ski Soda, from the Double Cola Company, is pretty obscure, but it has a lot of caffeine; 69mg/12 fl oz.

  4. Bryan

    Sorry the can….says right on it, 54mg in diet dew

  5. Lilu

    Smh @ everyone. Read the Label!!!!
    Do YOUR own research.

  6. Lilu


  7. Janet

    The funniest thing is that the company told me that the caffeine in diet orange Sunkist soda is naturally occurring in their ingredients. Did anyone ever hear of caffeine in oranges?

    • James

      That gave me a good laugh. How ridiculous.

    • Justena Rinehart

      They say what they think you want to hear, or treat us all like we’re stupid

    • Bryan

      Ha! You really think there is real orange in that can????

  8. Dave

    I drink 14 + diet Mt. Dews daily for over 7 yrs. What are the short term and long term health effects of this.

  9. Mehrambir

    Is caffeine contain in Appy

  10. susan priest

    You keep the information about the caffiene in your orange soda well hidden in very small print on your containers. I would have never known had someone not alerted me. This is irresponsible and a health risk to me. Some who may want the caffiene may want to know. To keep it rather hidden in small print is deceptive and just plain wrong. I will not buy or drink it anymore.

    • Ted

      Who are you talking to? We don’t make an Orange soda. You need to voice your complaint to the company in question.



  12. Gary


  13. DietSodaAttacksMe

    I have been getting these lumps in my breats and my doctor said it can come from too much caffeine in the body. The only thing I really drink/eat that could be a problem, was soda. So here I am, now I understand! She said that the problem is something called… well it has the word fiber in it.!!

    • Ted

      I have never heard of such a thing from consuming too much caffeine? In Fact, the contributing doctor at Mayo Clinic says the opposite. I believe consuming soda on a daily basis is never a good idea for anyone’s good health though.

      • pat Hoops

        I have to debate the response from Ted. My sister-in-law had lumps in her breasts, Dr’s did a biopsy and found fibroscysts (spelling could be wrong) but to the point: Dr’s said they were benign and nothing to worry about, however, was told they were caused by too much caffeine in her diet

        • Judith

          Yes, I agree that diet pepsi can cause lumps

  14. Caffeineboy

    What a douchebag. On the internet, whatever the topic, there’s ALWAYS a troll.

  15. Caffeineboy

    People act like caffeine is a bad thing. I won’t waste money on soda that doesn’t have caffeine in it. I wish they all had more, and that there were more flavors that were caffeinated, or better yet, had that as an option.

    • billy

      Maybe once you get a bit older Caffineboy you will understand the way too much caffine effects you body.

      • Lilu

        Apparently, you’re spelling shows an alcohol issue.

        • Achilles

          You’re = “you are”. You should have spelled it “your”.

  16. Bjorn

    It is called Jolt Cola Dr.Browns Jolt Cola.

  17. Kim

    Thank you for contacting Kroger. We appreciate your inquiry regarding the caffeine amount in the Extreme Citrus Drop. The Caffeine amount is 70.09mg per 12 oz

  18. ismel

    they usually all diet sodas

  19. Larry

    Hello? What do you think lite beer is? 1/3 less calories than regular.

  20. Larry

    It’s kinda nasty, but it’s all we had back then. So, I drank it and acquired a taste for it. They probably make it with Splenda now which improves the taste of everything.

  21. Joe

    hmm i belive it but wow!! Some say that coffee has more caffine than soda true? Or does it depend on the soda or type of coffee?

  22. keth

    i agree cheerwines amazing best pop around

  23. hcg diet

    Very interesting. Is there any diet beer?

  24. Jeff

    wouldnt jolt be considered an energy drink?

    i mean i dont know of any soda that has guarana, ginseng, and taurine, but i know a few energy drinks

  25. Halie S.

    what the heck is TAB?

  26. Haylee

    I always drink things like Monsters and Venom and stuff. Never anything else….

  27. ADP

    does Schweppers Soda gingembre contain caffeine?

  28. Dont Drink Diet Mountain Dew

    I just got back from the hospital bc my heart rate was out of this world. My roommate bought Diet Mountain Dew and i oviously didnt realize how much caffeine it had in it and now im paying for it with having horrible shakes and a racing heartbeat.

  29. Dennis

    Apparently I should proof read better or drink less Red Bull:

    My recent findings, as described by Health Canada, are that caffeine is allowed to be added to a food product

    should read:

    My recent findings, as described by Health Canada, are that caffeine is _not_ allowed to be added to a food product

  30. Dennis

    A note on the Canadian regulations:

    I was doing some research into the Mountain Dew in Canada (where I live) as someone told me the cola only caffeine was not true anymore and I was not able to provide a good reason why it would still be in place. My recent findings, as described by Health Canada, are that caffeine is allowed to be added to a food product, which soda beverages are classified, unless it is a cola-type beverage. All other products with added caffeine are listed as health products which are not regulated as food which is where the energy drinks made their inroads to Canada.

    The other interesting tidbit I learned was that Canada is one of the only nations in the world to regulate caffeine as a food additive. I am supposing the amount of caffeine in coffee, tea and chocolate and the associated consumption has led to a general belief that caffeine is safe in any quantity but here that belief is not held (which I think may actually be somewhat smart in that too much of anything is not usually good.) This lack of regulation may also have changed recently based on some of the other articles/postings I have seen regarding the European Union and United States.

  31. tony

    always use a straw best way to save ur teeth

  32. ana

    Then Diet Pepsi Max shouldn’t be on the list. The Pepsi Max line is part of Pepsi’s energy drink line.

  33. ad;flkgadfa

    well see it could have been 46.55 grams of caffeine as opposed to 46.53 grams of caffeine which would make it have more. That was an easy one; somebody did not pass 6th grade math

  34. kswheat

    There are caffeine-free “no caffeine” carbonated drinks for just about every large name brand soda (Pepsi, Diet Pepsi, Coke, Diet Coke, Dr. Pepper, etc.). As far as caffeinated medication, yes, some OTC medications do contain caffeine, such as Excedrin, but this is not plain Acetaminophen (Brand name Tylenol). After ingesting caffeine, it is completely absorbed within 30 to 45 minutes, and its effects substantially diminish within about three hours. It is eventually excreted so there is no accumulation in the body. Caffeine has been shown to affect mood, stamina, the cerebral vascular system, and gastric and colonic activity ( Caffeine is actually used in certain instances for medical treatments, such as with alcoholics who receive “banana bags” which contain multivitamins and other additives, one of which is caffeine. There is also a study showing Caffeinol, a drug combination of a huge does of caffeine and alcohol are helpful with stroke patients. Caffeine is good, but as we all should know, you can have too much of a good thing.

  35. T. Kallmyer

    Check out for a huge database of Caffeinated Products.

  36. me

    hey can anyone help me. . . . . .i have to do a science report on “What kind of soda has the most caffeine in it and what kind of cocktail is the most fattening”

  37. climbamtn

    canada has some strict labeling issues and requested mt dew be labled as an energy drink for the amount of sugar and caffeine, however amped is already the mt dew branded energy drink rather then change formula or labling they pulled all caffinated versions of mt dew from the canada. at this point in time there is no caffiene in any mt dew in canada.

  38. stirling

    does Dr Pepper taste good? I’ve heard so much about it, but I live in Australia so the only thing I really drink from this list is Coke/Pepsi/Sunkist/Mount Dew. hmm. . .

  39. How Much Caffeine

    Now you can do a comparison of the top 10 DIET energy drinks. There’s only 10000 of them.

    Great list I’ve never heard of many.

  40. Joe


  41. Beck

    come to UT you can find almost anytype of Soda you want with out caffeine (except Sunkist {dammit!}) There is no sundrop or cheerwine here but there are other local sodas here that have a similar flavor. (God bless Shasta Black Cherry).

  42. Norine

    I have been drinking Diet Sunkist for several years now and just learned that it does have caffeine! I was told by my doctor not to have any caffeine boy was I wrong when I started drinking Diet Sunkist.
    I only drink one a day so I think I will just keep on drinking………….

  43. Supplements Canada

    I can’t believe the caffeine in the diet sunkist orange drink. Also I am pretty surprised diet pepsi isnt on the list as well!

  44. Aaron B

    Squirt Citrus power has 73 mg. per 8 oz. Beats the pants off of Jolt (71.2 Mg.)

  45. ally knight

    well i guess that its not as bad for you as we thought you know


    ahahahahahah. all i have to say is, ew.

  47. Sandy

    I could never tolerate the taste of diet sodas…until the day I tried diet Pepsi MAX…I really do enjoy this soda and can even drink them warm…thanks to Pepsi for this great soda.