Relative Caffeine Content of Tea

Relative Caffeine Content of Beverages1
The following is the
approximate caffeine content
of various beverages
Milligrams of Caffeine
Item Average
per
serving
Range Per
ounce*
Coffee (5 oz. cup) 80  40 – 170 16.00 
Cola (12 oz. can) 45  30 – 60 3.75 
Black Tea (one tea bag) 40  25 – 110 5.00 
Oolong Tea (one tea bag) 30  12 – 55 3.75 
Green Tea (one tea bag) 20  8 – 30 2.50 
White Tea (one tea bag) 15  6 – 25 2.00 
Decaf Tea (one tea bag) 1 – 4 0.50 
Herbal Tea (one tea bag) 0 0.00 
*Assumes 8 ounces of water per tea bag

1 From the Stash Tea website

The Ultimate guide to tea!