Peet's brewed coffee vs Starbucks Refreshers: which has more caffeine?

Peet's brewed coffee has more caffeine than Starbucks Refreshers on both counts: 150mg per 8 oz cup against 45mg per 16 oz grande, and about 19mg per fluid ounce against 3. The serving sizes differ, so the table below shows both ways of counting.

Peet's brewed coffee vs Starbucks Refreshers: the numbers

Sources: Peet's brewed coffee's figure is verified in our Peet's brewed coffee caffeine guide against Caffeine Informer (source); Starbucks Refreshers's figure is verified in our Starbucks Refreshers guide against Starbucks nutrition listing (source).

The concentration gap is the striking part: Peet's brewed coffee packs roughly 7 times the caffeine per ounce. Sipping speed matters at that density; a 8 oz cup finished in minutes hits differently than the same milligrams spread over a slow cup.

Which one should you pick?

Pick Starbucks Refreshers when you want the lighter dose or a slower ramp, and Peet's brewed coffee 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

• Peet's brewed coffee: the full caffeine guide
• Starbucks Refreshers: the full caffeine guide
• The verified caffeine database
• Every drink compared: the comparisons index
• Compare any two of 120+ drinks

FAQ

Does Peet's brewed coffee or Starbucks Refreshers have more caffeine? Peet's brewed coffee: 150mg per 8 oz cup versus 45mg per 16 oz grande for Starbucks Refreshers.

Which is stronger per ounce? Peet's brewed coffee, at about 18.8mg per fluid ounce versus 2.8mg for Starbucks Refreshers.