Black Tea

Caffeine Level
Serving Size
fl. oz cup
Caffeine Strength
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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.

Tea 1 Min Steep Time 3 Min Steep Time 5 Min Steep Time
Lipton Decaf* 1.8mg 2.7mg 3.1mg
Lipton Regular* 17mg 38mg 47mg
Stash Darjeeling Black 14mg 22mg 27mg
Stash Earl Grey Black 24mg 41mg 47mg
Tazo Awake 59mg 59mg 61mg
Tazo Earl Grey 19mg 22mg 29mg
Twinings Earl Grey 19mg 22mg 25mg
Twinings English Breakfast 14mg 22mg 25mg
Twinings Irish Breakfast 17mg 24mg 30mg
Twinings Lady Grey 14mg 29mg 30mg
Twinings Prince of Wales 14mg 26mg 29mg
Two Leavs and a Bud Darjeeling 19mg 39mg 49mg

*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

Positively Tea Company, Organic Assam TGFOP, Black Tea, Loose Leaf, 16 oz. Bag

Available from Amazon / Organic Positively Tea Company

Davidson's Tea Bulk, English Breakfast, 16 Ounce

Available from Amazon / Davidson's

Harney & Sons Darjeeling Tea, Loose 4 oz tin, Black (46404)

Available from Amazon / Harney & Sons

Tetley Premium Loose Leaf Tea, 31.75 Ounce

Available from Amazon / Tetley

Ingredients in Tea (Black)

Sugar content: Contains no sugar.

Compare sugar levels of other drinks

Caffeine Comparisons

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 Espresso Shot Spike Energy Drink
Total Caffeine (mg)
400360320280 24020016012080 400 Cup of Black Tea Can of Coca-Cola Classic Bottle of Redline Energy Drink Can of Monster Energy Drink Can of Red Bull
Data Sources: 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.