Caffeine Intake Calculator

Add up caffeine from drinks and compare daily intake against common guidance limits.

Note: Common adult guidance is up to 400 mg/day, and pregnancy or breastfeeding guidance is often lower. Individual sensitivity varies.

Category: Life Tools

When to use?

Use it to track how much caffeine you consumed today and whether it is near a recommended upper limit.

How to use

  • Enter the number of drinks by type.
  • Check total caffeine in mg.
  • Compare against the daily reference limit.

Input Explanation

Enter cup or can counts for each drink type. Values use average caffeine amounts.

Calculation Basis

Total caffeine is the sum of each drink count multiplied by its average caffeine amount.

Usage Examples

  • Daily total check - Add up coffee, tea, and energy drink intake.
  • Limit awareness - See whether intake is close to 400 mg.
  • Sleep planning - Use the total as a reminder to reduce late caffeine.

Examples

  • 2 americanos + 1 energy drink → about 330 mg
  • 1 drip coffee + 2 green teas → about 180 mg

Cautions

  • This is an estimate for everyday planning. Actual results can vary by environment, product specifications, personal condition, and local rules.

Guides

Daily caffeine reference

Many adult guidelines use 400 mg per day as an upper reference, while pregnancy and sensitivity often require lower limits.

Drink differences

Caffeine varies by bean, brewing method, serving size, brand, and concentration, so listed amounts are averages.

FAQ

Does decaf have no caffeine?

Decaf usually still has a small amount of caffeine.

How long does caffeine last?

A common half-life is about 4–6 hours, so late intake can affect sleep.

Is 400 mg safe for everyone?

No, sensitivity, age, pregnancy, and health conditions can require lower intake.

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