Choose by question
Find the right caffeine tool
Want to plan your next coffee, check a label or see what might be left at bedtime? Start with the question that sounds most like yours. The timing tools all use the same half-life calculation.
Product labels and longer-term progress
Inspect sources, calculate from real labels and keep an honest record over time.
Coffee and drink finder
Compare products in our database, nutrition and explicitly unknown amounts.
Open toolLabel and dilution calculator
Calculate a whole-pack amount or a diluted concentrate from a numerical label.
Open toolMonthly and yearly history
Review recorded days and export or merge a private history backup.
Open toolReduction check-in
Compare your self-chosen schedule with recorded intake and download or print it.
Open toolChoose your next drink
Build an order, compare a bedtime target or find a lower-caffeine swap.
Coffee shop calculator
Build a documented Starbucks or Costa UK order with size and extra-shot estimates.
Open toolWhat can I drink now?
Find servings that fit your chosen estimated bedtime target.
Open toolCaffeine swap tool
Compare lower-caffeine alternatives to your usual drink.
Open toolWeekly caffeine report
Explore seven completed days of your private tracker history.
Open toolTiming
Estimate what remains and explore how dose, time and half-life change the result.
Caffeine remaining calculator
Start with any dose and see what may remain after a chosen number of hours.
Open toolBefore-bed calculator
Estimate the contribution of one or more drinks at your planned bedtime.
Open toolHalf-life calculator
Compare faster, central and slower caffeine-clearance scenarios.
Open toolWear-off calculator
Estimate when a combined total may fall below reference levels.
Open toolDaily planning
Plan a decision, record drinks privately or audit a typical day.
Caffeine planner
Test another drink, work backwards from bedtime or compare two plans.
Open toolDaily caffeine tracker
Log drinks on this device and view an estimated live curve and seven-day pattern.
Open toolDaily intake calculator
Add every serving in a typical day and identify the largest contributors.
Open toolMulti-drink caffeine calculator
Combine several doses and calculate an estimated bedtime total and timeline.
Open toolCutting down
Turn a measured starting point into a transparent comparison or gradual plan.
Drink data
Find a listed serving first, then carry that value into a calculator or tracker.
Caffeine database
Search named drinks, serving sizes, markets and evidence quality.
Open toolCaffeine-free fizzy drinks UK
Find manufacturer-identified options and check the exact variant.
Open toolEnergy-drink finder
Filter listed UK energy drinks by caffeine and serving size.
Open toolCompare drinks
Compare two drink servings and their estimated timelines.
Open toolUK caffeine database
Browse the UK caffeine data with sources and download it as CSV or JSON.
Open toolUK brand guides
Check which figures are first-party and which are clearly flagged as weaker evidence.
Open tool