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Caffeine Calculator

Add up the caffeine in your lattes, cold brews, espressos and teas, and see how your daily total compares to the commonly cited 400 mg guideline for healthy adults.

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How to use it

Add each drink you have in a typical day. The bar shows your total against the commonly cited 400 mg daily guideline for healthy adults.

Not medical advice. Caffeine tolerance varies a lot between people and situations (pregnancy, medication, heart conditions). Use this as a rough planning tool and check with a healthcare professional if you are unsure.

    Daily total

    0 mg

    0% of the 400 mg guideline.

    Typical caffeine per drink

    DrinkServingCaffeine (mg)

    Frequently asked questions

    Where does the 400 mg guideline come from?

    The U.S. FDA and EFSA both cite around 400 mg of caffeine a day as an amount not generally associated with negative effects for healthy adults. Pregnant people, teenagers and anyone with a heart condition are usually advised to stay much lower.

    How accurate are the per-drink numbers?

    They are typical averages. Real caffeine varies with bean, roast, grind, dose and brew time; a long-pulled espresso can hold twice the caffeine of a tight one.

    Does decaf have caffeine?

    A little, usually 2–7 mg per cup, which is why it is listed here.

    Is this medical advice?

    No. It is a planning tool. If you have questions about caffeine and your health, talk to a doctor or pharmacist.

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