Daily How Much

A single 1-ounce espresso shot contains about 63 mg of caffeine, but amounts can range from 29 to 100 mg depending on the bean and brew.

An 8-ounce mug of brewed coffee contains about 95 mg of caffeine, though the amount ranges from 80 to 165 mg depending on brewing method and bean.

A 30-ounce serving of brewed coffee typically contains 356 to 375 mg of caffeine, which is near the 400 mg daily limit generally considered safe.

A 12-ounce (355-ml) can of Diet Coke contains 46 mg of caffeine according to Coca-Cola, roughly half the caffeine found in an 8-ounce cup of brewed.

Caffeine estimates for a McDonald’s Mocha Frappe vary by size and source, but the range is roughly 75–100 mg for a small and 85–130 mg for a medium.

Decaf coffee typically contains 2 to 7 mg of caffeine per 8-ounce cup, with some brands and brewing methods reaching up to 15 mg per serving.

A 7.5-ounce mini can of Diet Coke contains about 29 mg of caffeine, based on the 46 mg found in a standard 12-ounce can.

Three standard 8-ounce cups of brewed coffee contain roughly 285 mg of caffeine on average.

A 24-ounce cup of brewed coffee typically contains 285–360 mg of caffeine, which falls within the 400 mg daily limit most healthy adults can tolerate.

A 7.5-oz mini can of Coca-Cola contains 21 mg of caffeine — about one-fifth the caffeine of an 8-oz cup of coffee.