Private Selection canned espresso (Kroger) vs Starbucks canned Nitro (Black): which has more caffeine?

Starbucks canned Nitro (Black) has more caffeine than Private Selection canned espresso (Kroger) on both counts: 155mg per 9.6 oz can against 145mg per 15 oz can, and about 16mg per fluid ounce against 10. The serving sizes differ, so the table below shows both ways of counting.

Private Selection canned espresso (Kroger) vs Starbucks canned Nitro (Black): the numbers

Sources: Private Selection canned espresso (Kroger)'s figure is verified in our Private Selection canned espresso (Kroger) caffeine guide against Caffeine Informer (source); Starbucks canned Nitro (Black)'s figure is verified in our Starbucks canned Nitro (Black) guide against PepsiCo product facts (source).

Which one should you pick?

Pick Private Selection canned espresso (Kroger) 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

• Private Selection canned espresso (Kroger): the full caffeine guide
• Starbucks canned Nitro (Black): the full caffeine guide
• The verified caffeine database
• Every drink compared: the comparisons index
• Compare any two of 120+ drinks

FAQ

Does Private Selection canned espresso (Kroger) or Starbucks canned Nitro (Black) have more caffeine? Starbucks canned Nitro (Black): 155mg per 9.6 oz can versus 145mg per 15 oz can for Private Selection canned espresso (Kroger).

Which is stronger per ounce? Starbucks canned Nitro (Black), at about 16.1mg per fluid ounce versus 9.7mg for Private Selection canned espresso (Kroger).