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Calcimator

Caffeine Intake Calculator

Track your daily caffeine intake from coffee, tea, soda, and energy drinks. Compare against FDA recommendations.

Inputs

Results

Daily Caffeine

335 mg

% of FDA Limit (400mg)84%
AssessmentModerate — within FDA recommendation
Hours to Clear System27.9 hrs
Weekly Total2,345 mg
How to Use This Calculator
  1. Enter the number of coffees, teas, sodas, and energy drinks you consume per day.
  2. Select the coffee cup size that matches your typical serving.
  3. Enter your body weight to get a personalized assessment.
  4. The calculator shows total daily caffeine in mg, percentage of the 400 mg FDA limit, and hours until it clears your system.
  5. Adjust beverage counts to find a daily intake within a healthy range.

How the result changes with Coffees per Day

Coffees per DayDaily Caffeine
2335 mg
71,055 mg
131,919 mg
182,639 mg

What each input means

Coffees per Day
Number of cups of coffee you drink each day
Coffee Size
Typical size of each coffee serving in fluid ounces
Teas per Day
Number of 8 oz cups of tea consumed daily — about 47mg caffeine each
Sodas per Day
Number of 12 oz cans of caffeinated soda consumed daily
Energy Drinks per Day
Number of energy drink cans consumed daily — about 160mg caffeine each
Body Weight
Your body weight — affects how caffeine is metabolized

How this is calculated

Formula

Coffee: ~12mg/oz, Tea: ~47mg/cup, Soda: ~34mg/can, Energy drinks: ~160mg/can. FDA recommends ≤400mg/day for adults.

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Coffees per Day = 2, Coffee Size = 12, Teas per Day = 1, Sodas per Day = 0 = 6 input(s) provided
  2. Calculate Daily Caffeine
    Daily Caffeine
    335 = 335
  3. Calculate % of FDA Limit
    % of FDA Limit
    84 = 84%
  4. Calculate Assessment
    Moderate — within FDA recommendation = Moderate — within FDA recommendation

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