Free Bedtime Reminder Tools
Best Nap Length Calculator
Find the best nap length for your available window and wake-up time, with suggested start and alarm times.
Open tool → CalculatorCalories Burned Sleeping Calculator
Estimate how many calories you burn when you sleep, with an optional BMR comparison using your age, sex and height.
Open tool → PlannerMelatonin Timing Planner
How much melatonin should I take? See the timing and study dose ranges published for sleep onset, jet lag and shift work—reference, not advice.
Open tool → PlannerNight Shift Sleep Schedule Planner
Build a repeatable night shift sleep schedule around your shift, commute, preferred sleep duration and days worked.
Open tool → CalculatorREM Sleep Calculator
Free REM sleep calculator: estimate your REM-heavy late-night window and approximate sleep periods from your schedule.
Open tool → CalculatorSleep Cycle Calculator
Free sleep calculator: work backwards from wake-up time or forwards from bedtime to plan 4, 5 or 6 sleep cycles.
Open tool → CalculatorSleep Debt Calculator
Use this sleep debt calculator to compare your usual sleep need with recent nights and see debt, surplus or a gradual recovery target.
Open tool → CalculatorSleep Efficiency Calculator
Use this sleep efficiency calculator to compare time asleep with time in bed and see the awake-time gap.
Open tool → CalculatorSleep Needs Calculator
Find how many hours of sleep you need by age, plus a bedtime range for your wake-up time.
Open tool → TimerSleep Timer
Free sleep timer with presets, a dim bedside display, pause and a gentle optional end chime.
Open tool → GeneratorWhite Noise Generator
Free white noise generator for sleep. Choose white, pink or brown noise, set volume and add a fade-out timer.
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