Health & Fitness · Free tool
Caffeine Intake Calculator
Log coffee, tea, soda, and energy drinks to see your total daily caffeine in mg instantly online. Compare against the 400 mg safe limit for free in your browser with no registration.
Total caffeine
218 mg
% of FDA daily limit (400 mg)
55%
Hours until bed
5.6 h
Caffeine remaining at bedtime
101 mg
Using a 5-hour half-life. Above ~50mg at bedtime may disrupt sleep for many adults.
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What it does
Log coffee, tea, soda, and energy drinks and see daily caffeine in mg, with the 400 mg adult safe-limit as a visible benchmark. Sensitive to afternoon timing too, so you can see how late caffeine interferes with sleep.
Pair with water intake calculator, sleep cycle calculator, alcohol unit calculator, and calorie calculator.
Embed this tool on your siteShow snippetHide
Paste this snippet into any page. Loads on-demand (lazy), no tracking scripts, and sized to most dashboards. Replace the height to fit your layout.
<iframe src="https://freetoolarena.com/embed/caffeine-intake-calculator" width="100%" height="720" frameborder="0" loading="lazy" title="Caffeine Intake Calculator" style="border:1px solid #e2e8f0;border-radius:12px;max-width:720px;"></iframe>How to use it
- Log each drink with size and time.
- Read total mg and time-of-last-drink.
- Compare to the 400 mg safe-limit line.
- Move late drinks earlier if sleep is an issue.
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Learn more
Guides about this topic
- How-To & Life · GuideHow to Manage Caffeine IntakeTrack your caffeine intake using the 400mg daily limit, half-life, and cut-off times. A free browser-only plan for tolerance, tapering, and sensitive groups in seconds.
- How-To & Life · GuideHow to Sleep BetterCreate 10 sleep habits that improve rest quality without melatonin marketing. Free, instant online guide with no sign-up needed.
- How-To & Life · GuideHow to Drink More WaterUse habit stacks and bottle tricks to drink more water effortlessly. Free instant guide on recognizing your hydration signals in your browser.
- How-To & Life · GuideBeginner Workout Plan at HomeA 4-week home workout for complete beginners. Bodyweight only, 20-30 minutes, three days a week.
- How-To & Life · GuideHow to Start RunningStart running without hating it. Follow a walk‑run plan to your first 5K in 8 weeks, plus learn injury avoidance tips. Free online guide, no sign‑up required.
- How-To & Life · GuideHow to Lose Belly FatSpot-reduction is a myth; rely on calorie deficit, strength, sleep, and stress control. Lose belly fat with our free online plan, no sign-up, in seconds.
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