Calculator-first guidance

Choose the right sleep calculator for tonight.

Navi Sleep Tools works best when you start with the specific decision you need to make tonight: when to sleep, when to wake, when to nap, or when to stop caffeine.

Start with Sleep calculator Compare paths

Plan tonight

Estimate wake-up and bedtime windows without treating them as medical measurements.

Protect tomorrow

Use caffeine, nap, and workout timing tools to reduce avoidable sleep disruption.

Know the limits

The tools are educational and should not replace clinical advice for ongoing sleep problems.

Start here

Pick the closest job and move one step at a time.

1Sleep calculatorEstimate bedtime or wake-up windows.Open 2Nap calculatorPick a nap length that fits your day.Open 3Caffeine cutoff calculatorFind a conservative caffeine stop time.Open 4Sleep Cycle FAQRead short answers before using the tools.Open

All sleep and wellness tools

The full tool set is still here. Start with the one that matches today's question.

Sleep CalculatorBedtime and wake-up windows Nap CalculatorShort nap and full-cycle nap timing Caffeine CutoffLast coffee time before bed Workout TimingTraining windows that protect sleep Chronotype QuizLion, Bear, Wolf, or Dolphin Sleep DebtWeekly sleep deficit estimate Jet Lag PlannerTravel recovery planning Melatonin TimingEducational timing guidance Kids Sleep CalculatorAge-aware sleep schedule planning Water IntakeDaily hydration estimate