1 cup of decaffeinated coffee has up to 1 from 7 mg caffeine, less than 97% of a normal coffee which can have up to 70 from 140 mg, up to the type of coffee. The tea leaf has more caffeine than the same amount of coffee, but to make tea we need less amount of tea than the coffee we need to use to make a cup of it. This is why 1 cup of tea has less ( Read more... )