Sleep Calculator
LiveCalculate multiple bedtime and wake-up options from adjustable sleep-cycle assumptions.
Calculator category
Lifestyle Calculators
Plan sleep schedules, naps, wake times, school routines, workday timing, and shift-work sleep windows with local calculators that keep assumptions visible.
Last reviewed: June 21, 202611 live tools
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Find sleep, bedtime, wake-up, nap, student, shift-worker, office-worker, or baby sleep tools.
11 calculators
Estimate complete sleep-cycle counts, partial time, and estimated cycle boundaries.
Calculate bedtime, wind-down start, and sleep onset from a required wake time.
Plan wake-up times from bedtime, sleep-now time, cycles, or target duration.
Nap Calculator
LiveCalculate nap wake time or reverse-plan a nap start with editable nap presets.
Estimate sleep shortfall or surplus across multiple days with arithmetic distribution.
Calculate time in bed, estimated sleep duration, deductions, and 24-hour sleep total.
Total baby night sleep and naps with age-reference context and safe-sleep notes.
Plan bedtime and wake time around school or class start, commute, and preparation.
Plan main sleep windows around day, evening, or night shifts with fatigue warnings.
Plan bedtime, wake time, commute, and morning preparation around office start time.
Sleep and Wellness Calculators
These tools use deterministic schedule math. They do not diagnose sleep problems, measure sleep stages, or guarantee alertness.
Core sleep planning
Sleep Calculator
LiveCalculate multiple bedtime and wake-up options from adjustable sleep-cycle assumptions.
Open calculatorEstimate complete sleep-cycle counts, partial time, and estimated cycle boundaries.
Open calculatorCalculate bedtime, wind-down start, and sleep onset from a required wake time.
Open calculatorPlan wake-up times from bedtime, sleep-now time, cycles, or target duration.
Open calculatorCalculate time in bed, estimated sleep duration, deductions, and 24-hour sleep total.
Open calculatorSpecialized planning
Nap Calculator
LiveCalculate nap wake time or reverse-plan a nap start with editable nap presets.
Open calculatorEstimate sleep shortfall or surplus across multiple days with arithmetic distribution.
Open calculatorPlan bedtime and wake time around school or class start, commute, and preparation.
Open calculatorPlan bedtime, wake time, commute, and morning preparation around office start time.
Open calculatorPlan main sleep windows around day, evening, or night shifts with fatigue warnings.
Open calculatorTotal baby night sleep and naps with age-reference context and safe-sleep notes.
Open calculator