Coffee has about five times the amount of caffeine as a can of coke
Caffeine, a component of coffee, soft drinks, and chocolate, is widely consumed and considered harmless.
It has been estimated that approximately 2.25 billion cups of coffee, the major source of dietary caffeine, are served every day, and that more than 80% of the world’s population consume at least one caffeine-containing beverage on a daily basis (Heckman et al., 2010).
Caffeine can enhance wakefulness, improve mood and energy levels, and even enhance athletic performance (Burns et al., 2014)
1 cup of coffee averagely is about 250ml, which contains 100mg of caffeine.
Can of coke of about 375ml should contain 30-35mg of caffeine.
With equal volume of coke and coffee. At 375 ml of coffee by volume, coffee contains about 150mg of caffeine.