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Caffeine Intake Calculator

Health & Body

Total caffeine from drinks vs the 400mg daily limit

Quick Answer

Caffeine Intake Calculator: Total caffeine from drinks vs the 400mg daily limit. Healthy adults: ≤ 400 mg/day, ≤ 200 mg per dose.

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How to Use

  1. Enter body metrics: fill height, weight, age etc. as prompted by the Caffeine Intake Calculator.
  2. Read value and grade: results appear instantly with an authority-based classification.
  3. Check reference tables: confirm your range and healthy targets against the tables on this page.
  4. Back-solve your goal: adjust inputs to see what it takes to reach a target.

Key Points

  • Caffeine Intake Calculator is a free online health tool — open and use, no sign-up.
  • All calculations run locally in your browser; your data never leaves the device.
  • Key capability: Total caffeine from drinks vs the 400mg daily limit.
  • Results come with formulas and reference tables so you can verify every number.

Formula & How It Works

Caffeine safety (EFSA/FDA)

Healthy adults: ≤ 400 mg/day, ≤ 200 mg per dose
Pregnancy: ≤ 200 mg/day · half-life ≈ 5 hours
Reference: americano 150mg, espresso 63mg, latte 75mg, black tea 47mg, cola 34mg, energy drink 80mg

FAQ

How do I use the Caffeine Intake Calculator?
Open the page and fill in the input fields — results update automatically. Total caffeine from drinks vs the 400mg daily limit.
Are the results accurate?
Results follow published international standards (WHO, ACE, IOM) and are for reference only.
Can this replace medical advice?
No. Always consult a qualified healthcare professional for health decisions.
Is it free? Do I need to sign up?
Completely free. No registration, login or download required.
Does it work on mobile?
Yes. The responsive design works on all devices.

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Source & Updates

Based on WHO, ACE, IOM and other published international standards. Last updated: 2025-07

Authoritative sources:

Last updated:

Formulas and content on this page are reviewed by the YiJianSuan team. For reference only — official sources prevail.

Cite this page: YiJianSuan. Caffeine Intake Calculator[EB/OL]. https://www.yijiansuan.com/en/c/health/caffeine

Results provided by this tool are for reference only and do not constitute professional advice.