Caffeine Content Chart

Caffeine varies widely by drink and serving size. This chart lists typical amounts so you can keep your daily total in check.

Drink Serving Caffeine
Brewed coffee 8 oz 95 mg
Cold brew 8 oz 100 to 200 mg
Espresso 1 oz 63 mg
Black tea 8 oz 47 mg
Green tea 8 oz 28 mg
Energy drink 8 oz 80 mg
Cola 12 oz 35 mg
Decaf coffee 8 oz 2 mg
Mind the daily total. Up to about 400 mg a day is considered safe for most adults, roughly four cups of brewed coffee. Cold brew can be much stronger than it tastes.

See the Caffeine Calculator and the Caffeine Content Comparison.

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The calculators and tools on Formula Factory are provided for general guidance and informational purposes only. Results are estimates based on standard formulas and the values you enter — they do not constitute professional engineering, electrical, or architectural advice. Always verify calculations with a qualified professional before making decisions for any safety-critical, code-compliance, or commercial application. Formula Factory makes no representations or warranties as to the accuracy or completeness of any result, and accepts no liability for errors, omissions, or any outcomes arising from reliance on this information.