Daily Caffeine Calculator
Search for a drink, choose the product, set servings and tap Consumed. Only drinks you actually add are saved.
⌂ HOME PAGE • ☕ Free caffeine tracker
Know your caffeine.
Know your caffeine.
Track what matters.
CaffStats helps you log the drinks you actually consume, see your daily and weekly caffeine history, explore caffeine levels by drink, and estimate how much caffeine may still be in your system.
✓ Search drinks & products
✓ Daily & weekly history
✓ Caffeine remaining estimate
Today at a glance
Live estimate
0 mg
caffeine consumed today
🥤 Drinks logged0
⚡ Remaining vs limit400 mg
⏱ Caffeine remaining—
Your real numbers appear here after you add a drink.
Everything you need in one place
Use the app as separate screens instead of scrolling through one long page.
Caffeine History
See what you consumed today or across the week, including caffeine amounts and your saved entries.
Statistics
Review daily, weekly, monthly or yearly patterns with totals, averages, categories and charts.
Caffeine Half-Life
Estimate how much caffeine may still remain based on your recorded drinks and your personal profile.
Drink Database
Search coffee, energy drinks, soda, tea and many brand and flavor variations. Popular drinks are shown first.
Made for Phone
Use the compact navigation and bottom app bar to jump directly between the parts you need.
How CaffStats works
Four simple steps from your first drink to a clearer picture of your caffeine.
Search
Type a brand, drink or flavor such as “Monster” or “Ultra White”.
Select
Choose the exact drink and serving from the search results.
Tap Consumed
Your drink is added to Today's History and your caffeine total updates.
Understand
Check History, Statistics and estimated caffeine remaining in your system.
What can you check?
Jump straight to the tool you need.
⚡ Your caffeine intake
See the caffeine you have logged and compare it with your chosen daily limit.
- Daily consumed caffeine
- Number of drinks
- Remaining amount vs your limit
- Quick access to your most-used drinks
⏱ What's still in your system?
The Half-Life screen uses your recorded History to estimate how your caffeine level may decline over time.
- Uses your recorded caffeine entries
- Shows estimated caffeine remaining
- Linear remaining-caffeine graph
- Personal profile inputs can refine the estimate
Ready to track your next drink?
Start with the calculator and build your caffeine history as you go.
CaffStats provides estimates for informational purposes. Caffeine content and clearance can vary by product, serving size and individual factors.
Daily Caffeine Calculator
Search hundreds of current, regional, classic and discontinued caffeine drinks. Values are estimates; check the label for the exact product and market.
Type to search. Tap a result to select it.
Frequently used
No drink selected. Search above to choose one.
Caffeine History
Only drinks you explicitly marked as consumed are saved.
Caffeine History
Linear trend based on your saved entries.
ConsumedAbsorbedRemaining
Your history is stored locally in this browser.
Caffeine Calculators, Drink Caffeine & Intake Resources
Explore common caffeine questions, drink categories and tracking topics. These resources are built around the same calculator and drink database used on this page.
Caffeine Intake & Tracking
Track daily caffeine intake, see your caffeine history, and compare your intake over time.
Caffeine in Coffee
Compare caffeine in brewed coffee, espresso, latte, cappuccino, mocha, cold brew and other coffee drinks.
Energy Drink Caffeine
Search energy drink caffeine amounts and compare popular brands and flavor variations.
Monster Caffeine
Find caffeine information for Monster Energy, Monster Ultra, Monster Java, Monster Rehab and many flavor variations.
Red Bull Caffeine
Search Red Bull caffeine amounts including popular editions and flavor variants in the drink database.
How Long Does Caffeine Last?
Use the caffeine-in-your-system calculator to estimate how much caffeine may remain based on your saved history.
This page uses natural, topic-focused language rather than hiding or repeating large keyword lists. The keyword research file was used as the content-planning source for these topics.
Caffeine Statistics
See your intake by day, week, month or year.
Caffeine Consumed0 mg
Absorbed Caffeine0 mg
Remaining0 mg
Average Absorbed—
Total Drinks0
Average Caffeine0 mg
Highest Drink0 mg
Lowest Drink0 mg
Consumed vs Absorbed vs Remaining
Top Caffeine Sources
Absorbed Caffeine by Product
Caffeine by Category
Detailed Period Data
| Period | Consumed | Absorbed | Remaining | Drinks |
|---|
How Long Is Caffeine in Your System?
This calculator automatically uses the drinks you marked as Consumed today and estimates how much caffeine is still in your system right now.
How this works: the calculator takes each caffeine entry from Today’s History, accounts for how long ago it was consumed, and applies an estimated half-life. Weight, height, age and sex are used only for a small illustrative adjustment; these factors do not precisely determine caffeine half-life for an individual.
Enter your details above. The calculation will update automatically from Today’s History.
Caffeine Remaining Over Time
The line starts with the estimated amount still in your system right now — not with the original amount you consumed.
Estimated caffeine remaining
Every point is calculated from the caffeine entries saved in your History that may still be contributing caffeine now.
Today’s caffeine sources
This is a simplified, illustrative model. It is not a medical measurement or a personalized pharmacokinetic calculation.
Caffeine by Drink
Popular drinks are shown first. Click the button to reveal the full expanded database (608 drinks/products).
Showing popular drinks
| Drink | Serving | Estimated caffeine |
|---|
Frequently Asked Questions
Common questions about using the calculator.
How does Caffeine History work?
Only drinks that you explicitly mark as Consumed are added to your local history.
Can I record absorbed caffeine?
Absorbed caffeine is shown as a user estimate when that value is stored with an entry. It is not a medical measurement.
What does Remaining mean?
Remaining is simply Caffeine Consumed minus the absorbed value you entered. It is not a measurement of caffeine remaining in your body.
Where is my history stored?
Your history is stored in localStorage in your browser.
How accurate is the caffeine database?
Values are estimates and can vary by product, flavour, serving size, market and preparation. Check the product label for the most accurate value.
Privacy
When you are signed in, your CaffStats history and profile settings can be synchronized to your Supabase account. When you are signed out, your account data remains stored in your account until you delete it. Local browser data may also remain on the device.
Disclaimer
This site provides general informational estimates. Absorbed caffeine values are user-entered estimates and not medical measurements. The personalized time-in-system estimate is a simplified model and not medical advice.