Daily How Much

An 8-ounce cup of decaf coffee typically contains about 2 to 15 mg of caffeine, compared to 70 to 140 mg in a regular cup.

One standard serving of Café Bustelo Instant Espresso — one teaspoon dissolved in six ounces of water — contains approximately 60 to 90 mg.

An 85% dark chocolate bar has about 80 mg of caffeine per 100 grams (3.5 oz), or roughly 23 mg per one-ounce serving.

An 8-ounce glass of iced tea typically contains 20 to 70 mg of caffeine, depending on the tea type and brewing method.

For most healthy adults, up to 400 milligrams of caffeine per day—about four cups of brewed coffee—is generally considered safe for the heart.

A 12-ounce can of Coca-Cola Classic contains about 32 to 34 mg of caffeine. An 8-ounce glass holds roughly 21 mg.

A single 1-teaspoon serving of Café Bustelo Espresso Instant Coffee contains roughly 60 to 90 mg of caffeine, per the brand’s consumer care team.

An 8 oz serving of Coca-Cola Classic contains approximately 22-23 mg of caffeine, about one-fourth the caffeine in the same amount of brewed coffee.

Medical guidelines recommend limiting caffeine to under 200 mg daily during pregnancy — roughly one 12-ounce cup of coffee — to reduce potential.

A medium (24 fl oz) Dunkin Iced Coffee contains approximately 297 mg of caffeine, with reported values ranging from 284 mg to 297 mg depending.