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GURU Original has 140mg of caffeine per 12 oz can, per Caffeine Informer. That works out to about 11.7mg per fluid ounce, a bit under brewed coffee at 11.9mg per ounce, though the bigger serving can close the gap. Against the two standards everyone actually knows, one 12 oz can equals about 1.5 cups of brewed coffee or 2.2 shots of espresso.
GURU Original vs coffee and espresso
| Drink | Serving | Caffeine | Per fl oz | Servings to reach 400mg |
|---|---|---|---|---|
| GURU Original | 12 oz can | 140mg | 11.7mg | 2.9 |
| Brewed coffee | 8 oz cup | 95mg | 11.9mg | 4.2 |
| Espresso | 1 oz shot | 63mg | 63.0mg | 6.3 |
How the number behaves
Energy drinks list an exact caffeine number because caffeine is a measured additive: every 12 oz can of GURU Original carries the same 140mg, unlike brewed coffee, where the beans, dose, and brew time move the figure around. That predictability is the one real advantage a can has over a cup: you always know exactly what you drank.
The mistake people make is stacking. One 12 oz can is 35 percent of the 400mg FDA reference, so a can on top of a normal coffee habit adds up faster than it feels like it should. Run the math on your whole day, not the single can.
Where to find it
Check GURU Original prices on Amazon
Compare it
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.
FAQ
How much caffeine is in GURU Original? 140mg per 12 oz can, per Caffeine Informer. That is about 11.7mg per fluid ounce.
Is GURU Original stronger than coffee? Ounce for ounce no: GURU Original carries about 11.7mg per fluid ounce versus 11.9mg for brewed coffee, and a full 12 oz can delivers 140mg versus 95mg in an 8 oz cup.
How many servings of GURU Original reach 400mg of caffeine? About 2.9 of the 12 oz can servings reach the 400mg daily amount the FDA cites for healthy adults.
Sources: the GURU Original figure (140mg per 12 oz can) is Caffeine Informer (source). Brewed coffee (95mg per 8 oz) and espresso (63mg per 1 oz) reference values are from USDA FoodData Central (source).
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.