Coffee Caffeine Calculator
Estimate the caffeine in your daily coffee from cups and brew method.
Quick answer: enter your details below and click Estimate Caffeine — your result appears instantly, right here in your browser. Nothing you enter is uploaded or stored.
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Enter your details below.
How to use
- Enter how many cups you drink per day.
- Choose your usual brew method.
- Click Estimate Caffeine for your daily total.
About this tool
Caffeine varies by brew method and serving size, so this calculator multiplies typical per-cup figures by your cups per day. Figures are estimates for guidance, not laboratory measurements, and actual caffeine depends on bean, grind, and brew time. Use it to compare habits, not to set medical limits.
Frequently asked questions
Why does cold brew score higher?
Cold brew is often served larger and steeped longer, so a single serving can carry more caffeine than a small espresso.
Is 400 mg a safe limit for everyone?
No. The 400 mg figure is a general guide for healthy adults, not a personal medical limit. Pregnancy, medication, and sensitivity change the picture.