Private Selection canned espresso (Kroger) has more caffeine than Red Bull on both counts: 145mg per 15 oz can against 80mg per 8.4 oz can, and about 10mg per fluid ounce against 10. The serving sizes differ, so the table below shows both ways of counting.
These are different categories of drink, which changes how the caffeine arrives. Energy drinks and sodas list an exact number because caffeine is a measured additive; brewed drinks vary with the beans and the brew, so their figures are compiled averages. The numbers here are the standard published values for each.
Private Selection canned espresso (Kroger) vs Red Bull: the numbers
| Private Selection canned espresso (Kroger) | Red Bull | |
|---|---|---|
| Caffeine per serving | 145mg per 15 oz can | 80mg per 8.4 oz can |
| Caffeine per fl oz | 9.7mg | 9.5mg |
| Servings to reach 400mg (FDA context) | 2.8 | 5.0 |
Sources: Private Selection canned espresso (Kroger)'s figure is verified in our Private Selection canned espresso (Kroger) caffeine guide against Caffeine Informer (source); Red Bull's figure is verified in our Red Bull guide against Red Bull label / Caffeine Informer (source).
Which one should you pick?
Pick Red Bull when you want the lighter dose or a slower ramp, and Private Selection canned espresso (Kroger) 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
- Private Selection canned espresso (Kroger): the full caffeine guide
- Red Bull: the full caffeine guide
- The verified caffeine database
- Every drink compared: the comparisons index
- Compare any two of 120+ drinks
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Gear from this guide
FAQ
Does Private Selection canned espresso (Kroger) or Red Bull have more caffeine? Private Selection canned espresso (Kroger): 145mg per 15 oz can versus 80mg per 8.4 oz can for Red Bull.
Which is stronger per ounce? Private Selection canned espresso (Kroger), at about 9.7mg per fluid ounce versus 9.5mg for Red Bull.
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