Calculation for Caffeine

With the previous finding about the types of coffee, somehow I realised the reason why I can only drink Americano. Based on the following websites, there are some differences in the amount of caffeine contain in each type of coffee:

Americano Coffee contains 12.83 mgs of caffeine per fluid ounce (43.39mg/100 ml).

CAFFEINE (MG) PER OUNCE

1009080706050403020100Americano Coffee5 Hour EnergyCoffee (Espresso)Coca-Cola ClassicSpike Energy Drink

Source: caffeine informer



Due to the lower caffeine content in Americano, I do not experience any allergic symptom when I drink Americano. This is a great news for me! I thought I could not enjoy coffee forever and ever.


Unfortunately it is very difficult to "standardize" the caffeine of coffee beverages since numerous variables need to be considered, including:  

• Beverage Size - are we comparing a cup at 4oz, 5oz, 12oz or 24oz?
• Blends - many roaster create their own blends of various beans each with subtle difference in caffeine content
• Bean Type - is the blend 100% arabica, robusta or both?
• Grind - was the coffee prepared with a fine grind, ultra fine grind, coarse, etc?
• Water Temperature - was the coffee prepared with the recommended 195-205°F temperature range?
• Milk - was milk added or not - as this will dilute the caffeine content
• Others - machine type, dwell time, etc. 

All these factors make the calculation of caffeine in coffee beverages a real challenge.  
coffee chemistry

If you calculate wrong, it is a completely different world. CALCULATION enables you to ‘judge’ well. Therefore, you must calculate well.
(Pastor Joshua Jung)

Thanks for the calculation for caffeine!