An 8-oz brewed coffee usually lands near 80–100 mg caffeine; a 8.4-oz Red Bull lists 80 mg.

A 20-oz bottle of Coca-Cola has around 57 mg of caffeine, which is a modest dose compared with coffee.

One 20-fl-oz Coke bottle has about 57 mg of caffeine; a 12-oz can has 34 mg, so bottle size is the whole story.

Coffee often lands between 80–200+ mg per mug, while an 8-oz hot chocolate often sits near 5 mg unless you add espresso or extra cocoa.

A standard 8-oz mug of instant coffee is often around 60–65 mg of caffeine, while a lighter mix can land closer to 30 mg.

A Starbucks brewed coffee runs from 155–324 mg of caffeine, based on cup size and the drink you pick.

An 8-oz brewed coffee lands near 80–100 mg of caffeine, while a 12-oz Coke sits at 34 mg.

Brewed coffee usually packs more caffeine per cup than black tea, yet mug size, strength, and steep time can narrow the gap.

Most roasted coffee beans carry about 10–20 mg of caffeine per gram, so a single bean often lands near 1–3 mg, depending on species and size.

A 12 oz brewed coffee often has 140–200 mg caffeine, while a 12 oz chai latte often lands near 30–90 mg, depending on recipe and brand.