How to use the daily total
Add servings, review the total, and understand its uncertainty. Use the label or café value for your actual serving. Changing the drink restores its reference value; other drinks can be logged by entering their caffeine amount.
Only the servings added here are counted. Include other caffeine sources. This list resets when the page reloads.
Reference servings and their limits
Data table| Drink | Portion | Caffeine |
|---|
| Filter coffee | 200 ml | 90 mg |
| Espresso | 60 ml | 80 mg |
| Black tea | 220 ml | 50 mg |
| Energy drink | 250 ml | 80 mg |
| Cola | 355 ml | 40 mg |
These are approximate EFSA portions, not measurements of V60, AeroPress, moka or cold brew. Brewing ratio describes coffee and water, not caffeine concentration. Adding water dilutes a drink but does not remove caffeine from the concentrate used.
Worked example
Three filter coffees at 90 mg each give 270 mg. Adding one 40 mg cola gives 310 mg. If a café lists 150 mg per cup, enter 150 and add the actual number of cups. A 60 ml espresso reference is not necessarily one café shot.
Sleep and individual limits
400 mg/day is a general reference for healthy, non-pregnant adults, not a target or a personal safe limit. Pregnancy, breastfeeding, medicines and medical conditions need individual guidance; this adult scale is not for children.
This total cannot predict safe sleep. EFSA reports that 100 mg near bedtime can affect sleep in some adults; sensitivity varies. We do not calculate a safe last-drink time.
Sources and method
EFSA — Caffeine (opens in a new tab): The source table is in EFSA’s food-and-drink FAQ. Its adult guidance supplies the reference line, not a personal recommendation. CoffeeMethods implements only the sum of entered milligrams × portions; it does not model metabolism.
FDA — Spilling the Beans (opens in a new tab): FDA explains variation between products and people; decaf still contains caffeine (typically 2–15 mg per 8 US fl oz). Prefer product-specific data.
Coffee-to-water ratio · Editorial method
