Free tools
Calculators and builders for sleeping against the clock. Everything here is free, computed in your browser, and does not require an account.
Updated August 2026
Sleep Plan Builder
Six questions about the schedule you actually work. Get a complete plan back: wake anchor, caffeine cutoff, light windows, meals, and naps, all computed from your answers. Free and printable.
Build my plan → BuilderSchedule Manager
Your rotation laid out on real calendar dates, not a generic pattern. See which days are work days, recovery days, and rest days, and what to do on each one.
Manage my schedule → CalculatorCaffeine Cutoff
Enter when you plan to sleep next. Get your last-coffee cutoff and your first-cup window, computed from caffeine's half-life. Instant, no signup.
Get my cutoff → CalculatorNap Calculator
Enter how long you have and whether the job can wake you. Get the nap length that fits, the alarm to set, and why, including the 40-to-60-minute danger zone to avoid.
Get my nap dose →Not sure where to start?
The Sleep Plan Builder covers everything the calculators do individually, mapped onto your actual rotation. Start there if you only have time for one.
Free, no account
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