Black Tea

Caffeine Levels

per fl. oz cup


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Caffeine in Tea varies quite a bit. The longer the tea (or tea bag) is steeped in water, the more caffeine will be present.

On average loose black tea had 22-28mg of caffeine per 1 gram dried matter. 

Most tea manufacturers do not list caffeine amounts on labels (one exception is Lipton regular tea listed at 55mg per serving).

The amount listed above is an average amount taken from various laboratory tests. Originally we listed an amount (47mg/8 fl oz brew) taken from the USDA. However more recent lab tests show this amount to be lower.

The following table lists recent lab test results for one tea bag of the various brands steeped in 6oz cups of water.

Tea1 Min Steep Time3 Min Steep Time5 Min Steep Time
Lipton Decaf*1.8mg2.7mg3.1mg
Lipton Regular*17mg38mg47mg
Stash Darjeeling Black14mg22mg27mg
Stash Earl Grey Black24mg41mg47mg
Tazo Awake59mg59mg61mg
Tazo Earl Grey19mg22mg29mg
Twinings Earl Grey19mg22mg25mg
Twinings English Breakfast14mg22mg25mg
Twinings Irish Breakfast17mg24mg30mg
Twinings Lady Grey14mg29mg30mg
Twinings Prince of Wales14mg26mg29mg
Two Leavs and a Bud Darjeeling19mg39mg49mg

*Lipton Tea publishes slightly different amounts, which we have summarized here.

Zest Black Tea has 150 mg of caffeine, but it is infused with extra caffeine.

What About Herbal Teas?

So-called herbal teas aren't actually tea at all, but a collection of other herbs and flavors. Herbal teas do NOT contain caffeine.

What About Green Tea?

Green Tea contains less caffeine than black tea. However it also is affected by brew time. The longer you leave your bag in the cup, the more caffeine you will get. See more about caffeine in green tea.

Where To Buy Black Tea

Ingredients in Tea (Black)

Sugar content: Contains no sugar.

Compare Sugar Content

Caffeine Concentration

Tea (Black) contains 5.25 mgs of caffeine per fluid ounce (17.75mg/100 ml).

Caffeine (mg) per Ounce
10090807060 5040302010 0 Tea (Black) 5 Hour Energy Coffee (Espresso) Spike Energy Drink


From the USDA database and also from journal: McCusker R.R.; Goldberger B.A.; Cone E.J., Caffeine Content of Brewed Teas, Journal of Analytical Toxicology, Vol. 32, October 2008, pp 702-704.