Healthy Coffee Calculator

Your details

Your current body weight. Used to personalise the caffeine limit.
kg
Teens have a lower recommended caffeine limit than adults.
The NHS and WHO recommend staying under 200 mg/day during pregnancy or when trying to conceive.
Sensitivity affects how quickly your body metabolises caffeine. Genetics (CYP1A2), regular coffee use, and medications all influence this.
Each brewing method extracts a different amount of caffeine. Moka pot and pour-over tend to be higher; decaf is very low.
Enter your actual daily intake to see how it compares with your personal limit.
cups
Adding milk does not change caffeine content but does add calories and can reduce the bitter taste, sometimes encouraging heavier consumption.
Sugar and syrups add calories and refined carbohydrate with no health benefit. Black coffee or unsweetened coffee is consistently rated healthiest.
Your daily caffeine limitWell within limit
400mg

Personalised FDA/NHS-based limit for your body weight and health profile

Max cups of that drink per day4.2cups
Caffeine per cup95mg
Your current daily intake190mg
Percent of your limit used0%
Weight-adjusted limit420mg
0% of limit
Low intake<0.5Moderate intake0.5-0.85Near limit0.85-1Over limit1+

You are using 48% of your 400 mg daily limit.

  • You can safely drink up to 4.2 cups of your chosen drink per day and stay under your limit.
  • Research links 2-5 cups of plain black coffee per day with reduced risk of type 2 diabetes, liver disease, and certain cancers in healthy adults.
  • Black coffee without sugar or cream is the healthiest preparation: no extra calories and maximum antioxidant benefit from chlorogenic acids.

Next stepFor the most accurate picture, note that caffeine content varies by brand, roast, and grind size, so actual mg per cup may differ from averages.

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