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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

Daily Caffeine

335 mg

How to Use This Calculator
  1. Start by filling in the input fields below. Results update instantly as you type, so you can experiment with different values to see how they affect the outcome.
  2. Coffees per Day — Number of cups of coffee you drink each day Accepts values from 0 to 20 (default: 2).
  3. Coffee Size — Typical size of each coffee serving in fluid ounces Choose from: Small (8 oz), Medium (12 oz), Large (16 oz), Extra Large (20 oz). default: 12.
  4. Teas per Day — Number of 8 oz cups of tea consumed daily — about 47mg caffeine each Accepts values from 0 to 20 (default: 1).
  5. Sodas per Day — Number of 12 oz cans of caffeinated soda consumed daily Accepts values from 0 to 10 (default: 0).
  6. Energy Drinks per Day — Number of energy drink cans consumed daily — about 160mg caffeine each Accepts values from 0 to 5 (default: 0).
  7. Expand "Advanced Options" for additional fine-tuning. These optional inputs let you model more specific scenarios:
  8. Body Weight — Your body weight — affects how caffeine is metabolized Accepts values from 80 lbs to 400 lbs (default: 170 lbs).
  9. Once all inputs are set, review your results in the Results panel. Here's what each output means:
  10. Daily Caffeine — shown as a numeric value. This is the primary result of this calculator.
  11. % of FDA Limit (400mg) — shown as a percentage.
  12. Assessment — your calculated result.
  13. Hours to Clear System — shown as a numeric value.
  14. Weekly Total — shown as a numeric value.
  15. View the Caffeine Sources below for a visual breakdown of how the numbers relate to each other.
  16. Explore the related calculators below if you need deeper analysis or want to approach this topic from a different angle.
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Formula

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

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