Which Coke Zero has no caffeine?

Caffeine-Free Coca-Cola Zero Sugar, sold as Coke Zero Sugar Zero Caffeine in some markets. Coca-Cola's own FAQ puts it at 0 mg. It is a separate product with its own label, so look for the words caffeine-free on the can; the standard Zero Sugar can has 34 mg.

Which Coke has the least caffeine?

The caffeine-free versions, at zero: Caffeine-Free Coca-Cola, Caffeine-Free Diet Coke and Caffeine-Free Coca-Cola Zero Sugar. Among the caffeinated ones, classic Coca-Cola and Coke Zero tie at 34 mg per 355 mL can on Coca-Cola's label, and Diet Coke is the highest at 45 mg.

Is Coke Zero or Diet Coke healthier?

This site does not rank drinks by health. What the labels show is that both have zero sugar and zero calories, both are sweetened with aspartame and acesulfame potassium, and Diet Coke has 11 mg more caffeine per can than Coke Zero. The taste is the real difference; Coke Zero is built to taste like classic Coke and Diet Coke is its own flavour.

How much caffeine is in a 500 mL or 1 L Coke Zero?

Coca-Cola's Canadian label says 48 mg per 500 mL bottle, which works out to 9.6 mg per 100 mL. A 1 L bottle at that strength is about 96 mg, roughly one cup of coffee spread across a litre of cola.

Does Coke Zero have the same caffeine as regular Coke?

Yes, on Coca-Cola's Canadian labels: both list 48 mg per 500 mL and both work out to 34 mg per 355 mL can. Switching from classic Coke to Zero changes the sugar, not the caffeine.

Caffeine & Health

Does Coke Zero Have Caffeine? Yes, 34 mg a Can

By Coffee Studies Editorial·Published November 13, 2026·5 min read

Quick answer

Yes. Coca-Cola's own label puts Coke Zero Sugar at 48 mg of caffeine per 500 mL bottle, and its FAQ says a 355 mL can holds 34 mg, the same as classic Coca-Cola and about a third of an 8 oz cup of brewed coffee at 95 mg. Diet Coke is higher at 45 mg a can. Caffeine-Free Coca-Cola Zero Sugar has 0 mg and is sold in Canada and the US.

Figure

Caffeine per 355 mL can, Coke family against coffee and tea

Values in mg per 355 mL (12 oz)

Caffeine-Free Coke Zero

0Coca-Cola FAQ

Generic cola, USDA

329 mg per 100 g

Coke Zero Sugar

34Coca-Cola label

Coca-Cola classic

3448 mg per 500 mL

Generic diet cola, USDA

4312 mg per 100 g

Diet Coke

45Coca-Cola panel

Black tea, 8 oz

47USDA

Brewed coffee, 8 oz

95USDA

Coke figures from Coca-Cola Canada product pages: Coke Zero 34 mg per 355 mL in the brand FAQ and 48 mg per 500 mL on the panel; classic Coca-Cola 48 mg per 500 mL scaled to a can; Diet Coke 45 mg per 355 mL on its Diet Coke Original panel. Generic cola, diet cola, tea and coffee are USDA FoodData Central values per 100 g scaled to 355 g or a 237 g cup.^[1]

Your can of Coke Zero has 34 mg of caffeine. That is Coca-Cola's own figure for a 355 mL can, it is the same as a can of classic Coke, and it is about a third of what you get from an 8 oz cup of brewed coffee at 95 mg.

^[1] ^[4]

If you came here because you switched from coffee to Coke Zero to cut caffeine, you did cut it, by about two thirds a serving. If you came here because you drink Coke Zero at night and sleep badly, you found a suspect, and there is a caffeine-free version waiting for you. Here are the numbers for the whole Coke family, from Coca-Cola's own labels.

34 mg

caffeine in a 355 mL can of Coke Zero Sugar, by Coca-Cola's own FAQ; the bottle label says 48 mg per 500 mL^[1]

95 mg

caffeine in an 8 oz cup of brewed coffee, USDA FoodData Central^[4]

0 mg

caffeine in Caffeine-Free Coca-Cola Zero Sugar, a separate product with its own label^[1]

How much caffeine is in your can of Coke Zero?

You get 34 mg from a 355 mL can, 48 mg from a 500 mL bottle and about 96 mg from a litre. Here is how that sits against the rest of the Coke family, a generic cola measured by USDA, and the coffee or tea you might be replacing.

The USDA rows are there so you can see the labels are not odd ones out. A generic cola measured by USDA gives you 32 mg a can and a generic diet cola 43 mg, within a few milligrams of what Coca-Cola prints.

^[4]

Coke Zero vs Coke vs Diet Coke: which has the most?

Diet Coke, by about 11 mg a can. Coke Zero and classic Coke give you the same.

^[1] ^[2] ^[3]

Drink	Caffeine, as Coca-Cola prints it	Per 355 mL can	Sugar
Coca-Cola classic	48 mg per 500 mL	about 34 mg	yes
Coke Zero Sugar	48 mg per 500 mL; 34 mg per can in the FAQ	34 mg	none
Diet Coke	45 mg per 355 mL on the Diet Coke Original panel	45 mg	none
Caffeine-Free Coca-Cola Zero Sugar	0 mg	0 mg	none
Diet Coke Caffeine Free	caffeine-free	0 mg	none

One thing you should know: Coca-Cola Canada's Diet Coke page shows you two caffeine panels, 45 mg per 355 mL on the Diet Coke Original card and 34 mg per 355 mL at the top of the page. The 45 matches USDA's measurement of diet cola, so that is the one you should trust. If you see 46 mg quoted elsewhere, that is the US label rounding the same drink.

^[3] ^[4]

Why would the diet one give you more? Caffeine goes into colas as a flavour ingredient, and the amount is a recipe choice, not something that comes from the sugar. Diet Coke is an older, separate recipe; Coke Zero was built to copy classic Coke, caffeine included.

Which Coke has no caffeine?

Three of them. Caffeine-Free Coca-Cola, Caffeine-Free Diet Coke and Caffeine-Free Coca-Cola Zero Sugar all list 0 mg, and the Zero version is the one you want if you drink Coke Zero now and want the same taste at night. Coca-Cola's own FAQ tells you it is sold in Canada; in the US and Europe you will see it under the Zero Caffeine name. ^[1]

It is a separate can, not a setting. Look for the words caffeine-free on the label; the ordinary Zero Sugar can does not say it and gives you the full 34 mg.

Will Coke Zero keep you awake?

It can, if you drink enough of it late enough. Think in cans: one can is a third of a coffee, three cans is a whole coffee. The FDA and Health Canada put your daily ceiling at 400 mg for a healthy adult, which is more than eleven cans, so the total is rarely your problem. Timing is.

^[5] ^[6]

If you want a Coke Zero with dinner and a clear night, buy the caffeine-free one for evenings and keep the regular one for the afternoon. You lose nothing in taste and you drop 34 mg from the hours before bed.

Is Coke Zero healthier than Diet Coke?

This site does not rank drinks by health, so here is what the labels tell you and nothing more. Both give you zero sugar and zero calories. Both are sweetened with aspartame and acesulfame potassium. Diet Coke gives you 11 mg more caffeine a can. The honest difference is flavour: Coke Zero is built to taste like classic Coke, Diet Coke tastes like Diet Coke, and you will know which you prefer after one can of each.

^[1] ^[3]

What to do

Swapping coffee for Coke Zero to cut caffeine? It works: 34 mg against 95 mg a serving. Just count the cans; three of them put you back where you started.
Drinking it in the evening? Switch the evening can to Caffeine-Free Coca-Cola Zero Sugar. Same taste, 0 mg.
Choosing between Zero and Diet for caffeine? Zero is lower, by 11 mg a can.
Buying bottles? A 500 mL bottle is 48 mg and a litre is about 96 mg, so a shared litre over an evening is a cup of coffee's worth.

The short version

Yes, your Coke Zero has caffeine: you get 34 mg from a 355 mL can and 48 mg from a 500 mL bottle, by Coca-Cola's own label. That is the same as classic Coke, 11 mg less than Diet Coke, and about a third of a cup of coffee. Caffeine-Free Coca-Cola Zero Sugar is the one that gives you none.

Watch

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Frequently asked questions

Which Coke Zero has no caffeine?: Caffeine-Free Coca-Cola Zero Sugar, sold as Coke Zero Sugar Zero Caffeine in some markets. Coca-Cola's own FAQ puts it at 0 mg. It is a separate product with its own label, so look for the words caffeine-free on the can; the standard Zero Sugar can has 34 mg.
Which Coke has the least caffeine?: The caffeine-free versions, at zero: Caffeine-Free Coca-Cola, Caffeine-Free Diet Coke and Caffeine-Free Coca-Cola Zero Sugar. Among the caffeinated ones, classic Coca-Cola and Coke Zero tie at 34 mg per 355 mL can on Coca-Cola's label, and Diet Coke is the highest at 45 mg.
Will Coke Zero keep you awake?: Less than a coffee would, but it is not nothing. One can is about a third of a cup of coffee; three cans is a full cup. If you are sensitive, a can after dinner can show up at bedtime, and the caffeine-free Zero exists for exactly that.
Is Coke Zero or Diet Coke healthier?: This site does not rank drinks by health. What the labels show is that both have zero sugar and zero calories, both are sweetened with aspartame and acesulfame potassium, and Diet Coke has 11 mg more caffeine per can than Coke Zero. The taste is the real difference; Coke Zero is built to taste like classic Coke and Diet Coke is its own flavour.
How much caffeine is in a 500 mL or 1 L Coke Zero?: Coca-Cola's Canadian label says 48 mg per 500 mL bottle, which works out to 9.6 mg per 100 mL. A 1 L bottle at that strength is about 96 mg, roughly one cup of coffee spread across a litre of cola.
Does Coke Zero have the same caffeine as regular Coke?: Yes, on Coca-Cola's Canadian labels: both list 48 mg per 500 mL and both work out to 34 mg per 355 mL can. Switching from classic Coke to Zero changes the sugar, not the caffeine.

Editorial noteThis article is for educational purposes only and is not medical advice. Caffeine tolerance and health circumstances vary from person to person. If you are pregnant, breastfeeding, caffeine-sensitive, taking medication, or managing a health condition, speak with a qualified healthcare professional.

References

Every factual claim in this article is drawn from the sources below. See the source library for how we grade evidence.

[1]Coca-Cola Zero Sugar, Coca-Cola Canada product page: nutrition panel (caffeine 48 mg per 500 mL) and FAQ (34 mg per 355 mL can; Caffeine-Free Coca-Cola Zero Sugar 0 mg)Coca-Cola Canada · 2026 · Reference work · Tier 3 · Contextual
[2]Coca-Cola Original Taste, Coca-Cola Canada product page: nutrition panel (caffeine 48 mg per 500 mL)Coca-Cola Canada · 2026 · Reference work · Tier 3 · Contextual
[3]Diet Coke, Coca-Cola Canada brand page: nutrition panels showing 45 mg per 355 mL (Diet Coke Original) and 34 mg per 355 mL (top panel), plus Diet Coke Caffeine FreeCoca-Cola Canada · 2026 · Reference work · Tier 3 · Contextual
[4]FoodData CentralU.S. Department of Agriculture · Official dataset · Tier 1 · Strong
[5]Spilling the Beans: How Much Caffeine Is Too Much?U.S. Food and Drug Administration · 2024 · Agency guidance · Tier 1 · Strong
[6]Caffeine in foodsHealth Canada · 2022 · Agency guidance · Tier 1 · Strong