Serving size explains part of the gap, but contact time explains the rest. Cold brew steeps for 12 to 24 hours, French press uses full immersion, and espresso pulls in under 30 seconds, which is why a single shot carries less caffeine than a mug of drip coffee.

Horizontal bar chart of caffeine by coffee brew method: cold brew 200 mg, French press 107 mg, drip coffee 95 mg, espresso 63 mg, instant 62 mg — Caffeine per typical serving by brewing method, from cold brew down to instant.

Typical values per standard serving: 12 oz for cold brew, 8 oz for brewed coffee, one shot for espresso. Brands and grind vary.

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Caffeine Content Rankings

Milligrams of caffeine in common drinks and doses, ranked from strongest to weakest. Type to filter. Values are typical figures per serving; brands vary.

Drink / dose	mg
Energy shot (2 oz)	200
Cold brew (12 oz)	200
Pre-workout (1 scoop)	200
Caffeine pill	200
Drip coffee (8 oz)	95
Yerba mate (8 oz)	85
Energy drink (8.4 oz)	80
Matcha (8 oz)	70
Espresso (1 shot)	63
Latte (12 oz)	63
Black tea (8 oz)	47
Diet cola (12 oz)	46
Cola (12 oz)	34
Green tea (8 oz)	28
Iced tea (12 oz)	25
Dark chocolate (1 oz)	23
Hot cocoa (8 oz)	5
Decaf coffee (8 oz)	2

Typical values compiled from USDA food data and manufacturer disclosures. A healthy adult ceiling is about 400 mg per day.

Comparison chart of caffeine per serving: coffee 95 mg, energy drink 80 mg, espresso 63 mg, black tea 47 mg, cola 34 mg — Caffeine per serving in the five most common sources, from drip coffee down to cola.

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