How to check caffeine intake
Add the caffeine from each serving and compare with a reference limit.
1
Enter milligrams per serving
Use the label value or a reliable estimate for the drink size.
2
Count servings
Include coffee, tea, cola, energy drinks and supplements.
3
Choose the group
The reference limit changes for pregnancy and adolescence.
What does this tool do?
Health agencies describe general caffeine ceilings rather than a universal safe dose. This calculator totals caffeine from servings and compares it with common reference limits for healthy adults, pregnancy and adolescents.
The Formula
Total caffeine = milligrams per serving × servings; remaining = reference limit − totalFrequently Asked Questions
How much caffeine is in a cup of coffee?
An eight-ounce brewed coffee contains roughly 95 mg, but strength varies widely. Espresso, tea, cola and energy drinks differ too.
Is 400 mg safe for everyone?
No. Pregnancy, some medications, heart conditions and individual sensitivity call for lower limits. Ask a clinician about your situation.