Log your beverages and see your running total against the FDA 400mg daily limit. All data stays in your browser.
Total mg Today
Remaining to FDA Limit
of Daily Limit
| Time | Beverage | Qty | Caffeine (mg) | Action |
|---|---|---|---|---|
| No entries yet. Add your first beverage above. | ||||
Add entries on different days to compare your caffeine patterns.
The calculator uses a verified database of caffeine content per serving. Each beverage is mapped to its average milligram value based on lab-verified HPLC data. Your running total is compared against the FDA 400mg daily limit for healthy adults.
Select a beverage type, enter quantity and time consumed, then click "Add to Log." Your entries are saved to localStorage automatically. Use the chart to visualize your daily intake pattern and identify peak caffeine hours.
• Log every drink, even small ones — they add up.
• Check the chart before your afternoon coffee.
• Export your log weekly to spot patterns.
• Remember: the FDA limit is 400mg, but sensitivity varies.