A standard 8.4 fl oz (250 ml) can of Red Bull contains about 80 mg of caffeine, which is roughly equivalent to the caffeine content in a small cup of coffee

. Larger can sizes contain proportionally more caffeine:

• 12 fl oz can: approximately 114 mg of caffeine
• 16 fl oz can: approximately 151–160 mg of caffeine
• 20 fl oz can: approximately 198 mg of caffeine

The caffeine content per fluid ounce remains consistent across different can sizes, at about 9.46 mg per fl oz

. This moderate caffeine level is designed to provide an energy boost without exceeding typical safe consumption limits for healthy adults.