This is about the same as one cup of normal coffee , or slightly less depending on the brewing method The actual caffeine level in Red Bull can vary depending on country , as some countries have legal restrictions on how much caffeine is allowed in drinks . This is about the same as one cup of normal coffee , or slightly less depending on the brewing method . The actual caffeine level in Red Bull can vary depending on country , as some countries have legal restrictions on how much caffeine is allowed in drinks .