Shaan Stevens,Caffeine Levels for Coffee, Tea & Other Drinks,Shaan Stevens-Caffeine Levels for Coffee, Tea & Other Drinks,Shaan Stevens-Caffeine Levels for Coffee, Tea & Other Drinks,Coffee, tea and chocolate all naturally contain varying amounts of caffeine, while colas often have different amounts of caffeine added to them. This guide to the caffeine levels outlines how much caffeine is in each of these drinks, including decaf coffee / tea, low-caffeine drinks and caffeine-free "herbal teas" (or tisanes).

Caffeine in Coffee

Many factors influence caffeine levels in coffee, so the amounts for each drink can vary widely. However, this general guide can help you determine about how much caffeine is in your coffee drink.
Drip Brewed Arabica Coffee (6 oz) - 80-130 mg (often around 110 mg)
Drip Brewed Robusta Coffee (6 oz) - 140-200 mg
Drip Brewed Passiona Excelsa/Arabica Low-Caffeine Coffee Blend (6 fl oz) - 40-60 mg
Drip Brewed Decaf Coffee (8 oz) - 2-12 mg, although testing has shown that decaf coffee levels are sometimes much higher
Instant Coffee (8 oz) - 27-173 mg (often around 65 to 90 mg)
Instant Decaf Coffee (8 oz) - 2-12 mg
Dunkin' Donuts Coffee (16 oz) - 143-206 mg
Einstein Bros. Coffee (16 oz) - 206 mg
Percolated Coffee (5 fl oz) - 80-135 mg
Starbucks Coffee Drinks - Varying levels; see this listing of Caffeine Levels of Starbucks Coffees for more information
You can cut down on caffeine from coffee with this video lesson on reducing caffeine in coffee.

Caffeine in Espresso
Espresso, Single Shot - 29-100 mg (often around 75 mg)
Espresso, Double Shot (Doppio) - 58-185 mg (often around 150 mg)
Decaf Espresso, Single Shot - about 8 mg
Decaf Espresso, Double Shot (Doppio) - about 16 mg
Nespresso Espresso Capsules - 55-65 mg
Nespresso Lungo Capsules - 77-89 mg
Caffeine levels in Starbucks Espresso Drinks and Starbucks Iced Espresso Drinks vary
Caffeine in Tea

There are many factors influencing caffeine levels in tea, including brewing time / temperature, tea grade and tea varietal.

Tisanes or "herbal teas" (including many of Celestial Seasonings' "teas") are usually caffeine free. Similarly, teas blended with other ingredients (such as mint green teas or masala chais) will often have lower caffeine levels than unblended teas.

Most studies show that black tea has between 40 and 120 mg caffeine per eight ounce serving. Decaf black tea usually contains about two to ten mg of caffeine.

The information below comes from a very interesting article on tea and caffeine by Bruce Richardson, who has been instrumental in debunking caffeine myths surrounding tea. Each seven-ounce cup of tea was steeped for three minutes.
Assam Black Tea (FTGFOP Grade) - 86 mg
Bai Mu Dan / China White Tea - 75 mg
Chinese Ti Kuan Yin Oolong - 37 mg
Darjeeling Autumnal (SFTGFOP1 Grade) Darjeeling White Tea - 56 mg
Indian Green Tea - 59 mg
Kenyan Green Tea - 58 mg
Ceylon Black Tea (OP Grade) - 58 mg