Starbucks canned Nitro (Black) has more caffeine than International Delight iced coffee on both counts: 155mg per 9.6 oz can against 88mg per 12 oz serving, and about 16mg per fluid ounce against 7. The serving sizes differ, so the table below shows both ways of counting.
Starbucks canned Nitro (Black) vs International Delight iced coffee: the numbers
| Starbucks canned Nitro (Black) | International Delight iced coffee | |
|---|---|---|
| Caffeine per serving | 155mg per 9.6 oz can | 88mg per 12 oz serving |
| Caffeine per fl oz | 16.1mg | 7.3mg |
| Servings to reach 400mg (FDA context) | 2.6 | 4.5 |
Sources: Starbucks canned Nitro (Black)'s figure is verified in our Starbucks canned Nitro (Black) caffeine guide against PepsiCo product facts (source); International Delight iced coffee's figure is verified in our International Delight iced coffee guide against Caffeine Informer (source).
Which one should you pick?
Pick International Delight iced coffee when you want the lighter dose or a slower ramp, and Starbucks canned Nitro (Black) when you actually need the bigger hit and know your tolerance. If you are stacking either with other caffeinated drinks through the day, run the math against the 400mg reference rather than guessing.
For context, the FDA cites 400mg of caffeine a day as an amount generally not associated with negative effects in healthy adults. Tolerance and health vary, so treat these numbers as information, not advice.
Related reading
- Starbucks canned Nitro (Black): the full caffeine guide
- International Delight iced coffee: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
As an Amazon Associate, Barista Life earns from qualifying purchases.
Gear from this guide
FAQ
Does Starbucks canned Nitro (Black) or International Delight iced coffee have more caffeine? Starbucks canned Nitro (Black): 155mg per 9.6 oz can versus 88mg per 12 oz serving for International Delight iced coffee.
Which is stronger per ounce? Starbucks canned Nitro (Black), at about 16.1mg per fluid ounce versus 7.3mg for International Delight iced coffee.
Comparing caffeine? The caffeine comparison tool puts hundreds of drinks side by side, and the caffeine curfew calculator can check your cutoff time for tonight.
Get the good coffee stuff
One email a week: what we verified, what is worth buying, and what is not. No spam, unsubscribe any time.