Source-backed comparison

Compare Caffeine by Drink, Brand and Serving Size

Compare two source-backed drink records by serving, market, caffeine amount, concentration and calculated half-life timeline.

First drinkFirst servingSecond drinkSecond serving

Measure	Red Bull Energy Drink	Brewed coffee
Named serving	250 ml can	8 fl oz / 237 ml
Market	UK	General reference
Caffeine per serving	80 mg	95 mg
Caffeine per 100 ml	32.0 mg	40.1 mg
Value basis	Manufacturer listed	Authoritative reference
Estimated after 5 hours	40 mg	47.5 mg
Absolute difference	15 mg	15 mg
Difference vs lower serving	18.8%	18.8%

Choose any two records. The selected default serving is used; open each detail page to inspect every documented size.

Calculated five-hour timeline

This table applies the same exponential half-life equation to both starting amounts. It does not show measured blood levels or predict which drink will affect a particular person more.

Hours after serving	Red Bull Energy Drink	Brewed coffee
0	80 mg	95 mg
3	52.8 mg	62.7 mg
5	40 mg	47.5 mg
8	26.4 mg	31.3 mg
10	20 mg	23.8 mg
12	15.2 mg	18.0 mg

Sources

Red Bull GB product informationUK product page for the standard 250 ml can.
USDA FoodData CentralRepresentative reference value; not a promise for every bean or brewing method.

Find lower-caffeine alternatives to Red Bull Energy Drink or compare drinks against a bedtime target.

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