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A 20-ounce Diet Coke contains about 91 mg of caffeine; fountain or international formulas may vary.

A 12-ounce latte caffeine range is about 75–150 mg, mainly driven by how many espresso shots go in the cup.

An eight-ounce coffee typically has 80–100 mg of caffeine, but roast, grind, and brew method can swing it lower or higher.

A six-ounce coffee typically carries 60–110 mg of caffeine, with bean, roast, and brew method shifting the range.

Most 3-in-1 coffee sticks deliver about 50–100 mg of caffeine per sachet, with “strong” blends tending toward the higher end.

Two tablespoons of instant coffee contain roughly 180–540 mg of caffeine, depending on brand strength and how tightly it’s packed.

A 12-ounce coffee typically contains 120–180 mg of caffeine, with ~60–260+ mg across methods based on ratio, grind, roast, and time.

One roasted bean averages ~6 mg caffeine; a small handful (8–10 beans) lands around 48–60 mg, depending on bean type and roast.