When should your last coffee be?
Tap what you drink. In 10 seconds you'll see your time.
Have your last one by then and most of it has worn off by bedtime.
Free. No sign-up to see your result.
All 240+ drinks and search
Your cutoff: --:--
Tap a drink. You'll see your time, and how much caffeine is still in you at bedtime.
Your caffeine cutoff
for an bedtime
Free 7-day plan: keep your coffee, time it better.
- Your last drink lands before 2pm, nothing given up
- Find the caffeine you're not counting
- Check if your first coffee still does anything
1 short email a day for 7 days. Unsubscribe any time.
See all 7 days
- Day 1 Your cutoffYour time, and why it's about 9 hours before bed. Change nothing yet, just note it
- Day 2 Move one drinkSame coffee, earlier. How your cutoff moves with late nights and early starts
- Day 3 The caffeine you didn't countTea, cola, energy drinks, chocolate, some tablets
- Day 4 Does your first coffee still do anything?A 10-second check you do with your next first cup
- Day 5 Keep the break, swap the drinkDecaf, rooibos and herbal tea for the afternoon cup
- Day 6 What timing can't fixWhy one cup can stop working, whatever time you drink it
- Day 7 Read day 1 backCompare your week and keep your cutoff. And if one cup has stopped working, the way out
Day 1 is on its way, .
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For the friend who has a flat white at 4pm.
Add a drink to see your day
Your {drink_time} {drink} is most of what's still in you at bedtime.
Caffeine figures are indicative and vary by brand, serving and preparation. This is an estimate, not medical advice.
Want one cup to work again?
The kit is a 30-day plan that steps your caffeine down for you. Nothing to count. Ships by 30 October.
See the kit
Now bring that number down
You have just seen what is still in you at bedtime. Reset takes your caffeine down by capsule count over 20 days, and Flow carries you through the ten days after that with no added caffeine.
Manufactured in the UK, GMP certified, ships by 30 October, cancel any time before dispatch.
How this works
How this is worked out
Caffeine’s half-life is about five to six hours, so around half a dose remains six hours later and roughly a quarter six hours after that. The tool projects each drink through your day, estimates what may be left at bedtime, and shows your peak level. The 50 mg line is a practical threshold for the tool, not a medical limit.
Why your own number will vary
Caffeine content swings widely by brand, bean, grind and brew time, so two flat whites are rarely the same drink. How fast you clear it varies between people as well, largely for genetic reasons, and it is slower in pregnancy and with some medications. Treat the figure as an estimate to think with rather than a measurement.
What actually moves it
Two things: how much, and how late. Moving your last drink earlier changes the bedtime figure the same day, which is the quicker win. Bringing the daily total down is the slower one, and stepping the dose down over weeks is generally easier to hold than stopping outright.
