Coffee is the first thing that comes into your mind when someone says caffeine. Your average cup of coffee contains around 95 mg of caffeine, yet this does not apply to all types and variants of coffee. Each variant has different caffeine levels ranging from almost nothing to the highs of 500 mg! Here are a few examples to show just how broad the caffeine levels in coffee truly are…
Caffeine in Filter Coffee
Probably the most common variant of coffee, brewed coffee, known as regular coffee is made by pouring hot steamy water over average ground coffee beans within a filter. One cup of brewed coffee contains about 70–140 mg of caffeine or about 95 mg on average so this is really the baseline for coffee and what most peoples’ average caffeine intake would be.
Caffeine in Decaf Coffee
As seen in the name, decaffeinated coffee is much lower in caffeine yet is not completely caffeine-free! It may contain varying amounts of caffeine, ranging from 0–7 mg per cup, with the average cup containing 3 mg. This of course is still a very low intake of caffeine and most decaffeinated coffee contains this same range although some types can be higher or lower, depending on the brand.
Caffeine in Espresso Coffee
Espresso is made by forcing a small amount of hot water, or steam, through finely-ground coffee beans. It is seen as a more luxurious type of coffee as it is smoother and usually has more flavour than other types of coffee. This is usually the basis of Cappucino, Latte and a Mocha, which are the typical drinks in a regular high street coffee shop.
Although espresso has more caffeine than regular coffee, it usually contains less per serving, since espresso servings are much smaller. One shot of espresso is generally about 30–50 ml and contains about 63 mg of caffeine. Two shots however, contains around 125mg of caffeine!
Caffeine in Instant Coffee
Instant coffee is made from brewed coffee that has been freeze-dried or spray dried. It is generally in ground dry pieces, which dissolve in water. To prepare instant coffee you just must mix one or two teaspoons of dried coffee with hot water.
Instant coffee is perhaps the most convenient type of coffee as there is no need for any brewing. It usually contains less caffeine than regular coffee, with one cup containing roughly 30–90 mg, however again certain brands will of course vary.