In many products, 100 mg of coffee fruit extract lands around 1–2 mg of caffeine, but labels can range from near-zero to triple digits.

A 12-oz can of Coca-Cola contains 34 mg of caffeine, a modest dose compared with most brewed coffee.

One level teaspoon of ground coffee usually holds 20–60 mg of caffeine, depending on bean type, roast, grind, and how tightly it’s packed.

A typical 10-oz brewed coffee lands around 120 mg of caffeine, yet a “same size” cup can swing from under 100 mg to over 200 mg.

Half a teaspoon of matcha lands near 20–45 mg of caffeine when the powder is close to 1 gram.

A typical 10-ounce brewed coffee lands around 95–150 mg of caffeine, with bean choice and brew strength driving the swing.

A level teaspoon of matcha often lands around 30–70 mg of caffeine, with the swing coming from powder weight, grade, and how it’s measured.

A level teaspoon of regular instant coffee powder has about 31 mg of caffeine, though a rounded spoon can land higher.

A single roasted coffee bean usually carries 1–3 mg of caffeine, with variety and bean size pushing it lower or higher.

A mug of brewed coffee usually delivers about 2–3× the caffeine of brewed green tea, though brew strength and cup size can flip it.