About CaffeineTime
Free calculators and plain-English guides for getting the good parts of caffeine without paying for it in sleep or nerves.
What you can do here
- Work out the latest time for your last coffee before bed, as a range rather than a single number.
- Plan a whole day of caffeine and see what it leaves behind at bedtime.
- Look up how much caffeine is in a drink, with the source of every number.
- Read short guides on caffeine and sleep, jitters, energy and cutting back.
Who makes it
CaffeineTime is made by a small independent team that builds free self-help tools around sleep and anxiety. We are not doctors, and the site is not medical advice. Read how we choose sources and check pages in our editorial policy.
Your data
The calculators run in your browser. The drinks, times and amounts you enter are not sent to us. There are no accounts. Details are in the privacy policy.
Contact
Questions or corrections: developyourself.studio@gmail.com.