XS Energy vs brewed coffee: which has more caffeine?

brewed coffee has more caffeine than XS Energy on both counts: 95mg per 8 oz cup against 80mg per 8.4 oz can, and about 12mg 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.

XS Energy vs brewed coffee: the numbers

Sources: XS Energy's figure is verified in our XS Energy caffeine guide against Caffeine Informer (source); brewed coffee's figure is verified in our brewed coffee guide against USDA FoodData Central (source).

Which one should you pick?

Pick XS Energy when you want the lighter dose or a slower ramp, and 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

• XS Energy: the full caffeine guide
• brewed coffee: the full caffeine guide
• The verified caffeine database
• Every drink compared: the comparisons index
• Compare any two of 120+ drinks

FAQ

Does XS Energy or brewed coffee have more caffeine? brewed coffee: 95mg per 8 oz cup versus 80mg per 8.4 oz can for XS Energy.

Which is stronger per ounce? brewed coffee, at about 11.9mg per fluid ounce versus 9.5mg for XS Energy.