Caffeine Calculator -

Your profile

Units

Weight (kg) — optional

Any of the following apply?

Pregnant or breastfeeding Heart condition / high blood pressure Anxiety or caffeine sensitivity Trouble sleeping

Quick habit check (estimates your current intake)

Coffee, 8oz cups / day

Espresso shots / day

Tea, 8oz cups / day

Soda, cans / day

Energy drinks / day

Other (pills, pre-workout, chocolate) — mg/day

Usual wake time

Usual bed time

—estimated intake

Estimated vs recommended

Enter your details to fill the mug.

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Result

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Recommended daily limit

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Your estimated intake

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Gap to close

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Smart cutoff time

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In your system at bedtime

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Weekly total

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mg per kg bodyweight

In-depth insight

Enter your details to see what your numbers mean.

General guidance for healthy adults (FDA/EFSA-aligned limits). The habit-check intake is a rough estimate, not a lab measurement. Caffeine sensitivity varies a lot by individual and genetics — if you have a heart condition, anxiety disorder, or are pregnant, set your target with your doctor.

Caffeine in common drinks & foods

Calculate above to fill the chart

Suggestions for you

Calculate above to see personalized suggestions.

Smart intake schedule

Window	Budget	Why
Calculate above to generate your schedule.

Caffeine has a roughly 5–6 hour half-life, so afternoon and evening doses linger longer than they feel like they should — the cutoff time is what protects your sleep, not just the total.

History

#	Time	Limit	Estimated intake

No calculations yet — results appear here automatically.

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