Does Coke Zero have caffeine?
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Yes. Regular Coca-Cola Zero Sugar contains caffeine, and caffeine is listed in its ingredients. Coca-Cola Great Britain does not publish a separate figure for it, but there is also a caffeine-free version, Coca-Cola Zero Sugar Zero Caffeine. For comparison, Coca-Cola GB gives 34 mg of caffeine for a 330 ml can of Coca-Cola and 46 mg for a can of Diet Coke.
Key points
• Coca-Cola Zero Sugar contains caffeine: it is in the ingredients list.
• Coca-Cola Zero Sugar Zero Caffeine is the caffeine-free version.
• Coca-Cola GB: Coca-Cola 34 mg per 330 ml can, Diet Coke 46 mg per can.
• Coca-Cola's Philippines FAQ lists Coca-Cola Zero Sugar at 32 mg per 330 ml. Recipes differ by country.
• A can of cola has about 40 mg of caffeine (NHS).
Table of contents
- Does Coke Zero have caffeine?
- How much caffeine is in Coke Zero?
- Coke Zero Zero Caffeine
- Coke Zero vs coffee, tea and energy drinks
- How to check the can
- FAQ
Does Coke Zero have caffeine?
Yes. Regular Coca-Cola Zero Sugar lists caffeine in its ingredients. "Zero" refers to sugar, not caffeine. The only version without caffeine is the one labelled Coca-Cola Zero Sugar Zero Caffeine, which does not list caffeine in its ingredients. For all the Coca-Cola figures, see our main guide: How much caffeine is in cola? Coke, Diet Coke and more. More: Caffeine pouches vs energy drinks · Caffeine pouches in the UK
How much caffeine is in Coke Zero?
| Drink | Serving | Caffeine | Source |
|---|---|---|---|
| Coca-Cola | 330 ml can | 34 mg | Coca-Cola GB |
| Diet Coke | 1 can | 46 mg | Coca-Cola GB |
| Coca-Cola Zero Sugar | 330 ml can | no separate figure on the GB page | Coca-Cola GB |
| Coca-Cola Zero Sugar Zero Caffeine | 1 can | caffeine-free | Coca-Cola GB |
| Coca-Cola Zero Sugar (Philippines) | 330 ml | 32 mg | Coca-Cola Philippines |
Work out your own total: caffeine calculator.
Sources: Coca-Cola Great Britain, "What is caffeine?" FAQ page (checked October 2026); Coca-Cola Philippines FAQ. Recipes differ by country and can change, so check the can you buy.
The Coca-Cola Great Britain FAQ does not give a milligram figure for regular Coca-Cola Zero Sugar. Coca-Cola's Philippines FAQ lists Coca-Cola Zero Sugar at 32 mg per 330 ml, the same as Coca-Cola Classic there. Because recipes differ by country, treat that as a guide, not a UK figure.
Coke Zero Zero Caffeine
Coca-Cola Great Britain lists Coca-Cola Zero Sugar Zero Caffeine as caffeine-free. It has no sugar and no caffeine. Read the name on the can and the ingredients list to be sure which one you have.
Coke Zero vs coffee, tea and energy drinks
| Drink | Serving | Caffeine |
|---|---|---|
| Cola | 1 can | about 40 mg |
| Tea | 1 mug | about 75 mg |
| Energy drink | 250 ml | about 80 mg |
| Instant coffee | 1 mug | about 100 mg |
| Filter coffee | 1 mug | about 140 mg |
Source: NHS.
A can of cola has less than half the caffeine of a mug of instant coffee. More: Sugar-free energy drinks · Caffeine in Monster and Red Bull
How to check the can
- Read the name. "Zero Sugar" means no sugar. Only "Zero Sugar Zero Caffeine" means no caffeine.
- Read the ingredients. Regular Coca-Cola Zero Sugar lists caffeine; the Zero Caffeine version does not.
- Look for a warning. In the UK, drinks with more than 150 mg of caffeine per litre must say "High caffeine content. Not recommended for children or pregnant or breast-feeding women" and give the amount per 100 ml. Most colas are below that level, so the can may not state the caffeine.
Every can counts towards your daily total. For healthy adults, up to 400 mg of caffeine a day is unlikely to cause adverse effects, and the limit in pregnancy is 200 mg a day (FSA and FSS, 2024). More: How much caffeine is too much?
Optimal Native caffeine pouches state the caffeine per pouch on the label: Morning Energy 200 mg, Daily Flow 75 mg and Evening Relax 0 mg, with no sugar.
FAQ
Is Coke Zero caffeine-free?
No. Regular Coca-Cola Zero Sugar contains caffeine. Coca-Cola Zero Sugar Zero Caffeine is the caffeine-free version.
How much caffeine is in a can of Coke Zero in the UK?
Coca-Cola Great Britain does not publish a separate figure. Coca-Cola's Philippines FAQ lists 32 mg per 330 ml there, but recipes differ by country.
Does Diet Coke have more caffeine than Coke?
Yes. Coca-Cola GB gives 46 mg per can of Diet Coke and 34 mg per 330 ml can of Coca-Cola.
Does Coke Zero have more caffeine than coffee?
No. A can of cola has about 40 mg of caffeine; a mug of instant coffee has about 100 mg (NHS).
Read next: How much caffeine is in cola? · Sugar-free energy drinks · Energy drinks with the least caffeine · Does Pepsi Max have caffeine?
Optimal Native is coming to the UK. One stack for the whole day: Morning Energy, Daily Flow and Evening Relax. Pre-orders ship from 15 December 2026.