Sleep Better Tonight,
Wake Up Refreshed
Science-backed sleep calculators, interactive tools, and expert guides — all free, instant, and designed to transform your sleep quality.
Our Sleep Tools & Services
Everything you need to understand, track, and improve your sleep — powered by peer-reviewed science.
Quiz
Sleep Quality Audit
Comprehensive 2-minute diagnostic sleep health assessment (0–100) with personalized disrupter identification.
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Calculator
Sleep Cycle Calculator
Find the perfect bedtime or wake-up time based on 90-minute sleep cycles. Includes live sleep graph preview.
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Calculator
Bedtime Calculator
Dedicated bedtime tool with drum picker interface and interactive cycle graph visualization.
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Calculator
Kids Sleep Calculator
Pediatric bedtime calculations using shorter sleep cycles (50–70 min) tailored to infants through school-age.
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Calculator
Nap Calculator
Find the optimal nap length to boost energy without grogginess. Real-time wake-up time calculation.
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Calculator
World Cup Sleep Planner
Convert kickoff times to your timezone and optimize sleep cycles, naps, and recovery for late-night matches.
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Calculator
Caffeine Sleep Calculator
Track caffeine decay in your system with an interactive SVG graph. See how coffee impacts your bedtime.
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Calculator
Melatonin Calculator
Calculate the optimal timing and dosage for melatonin based on your goals and circadian rhythm.
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Calculator
Weighted Blanket Calculator
Determine your ideal weighted blanket weight and size for calming, deep pressure sleep therapy.
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Calculator
Sleepy Girl Mocktail
Optimize your recipe proportions and drinking time window to fall asleep without waking up to urinate.
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Calculator
Ashwagandha Calculator
Find your standardized dose and generate weeks on/off cycle schedules to avoid emotional blunting.
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Guide
Mouth Taping Guide
Screen yourself for safety, run the nasal clearance test, and learn clinical protocols.
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Quiz
Sleep Divorce Quiz
Calculate your couples sleep compatibility score and discover customized co-sleeping arrangements.
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Quiz
Magnesium Quiz
Which magnesium form is best for you? Evaluate your physical and brain symptoms to find your chelate.
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Calculator
Steroid Calculator
Optimize morning dose timing for prednisone or dexamethasone to clear levels before bed.
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Calculator
Polyphasic Planner
Design custom Everyman or Biphasic routines and map sleep blocks on a circular 24h dial.
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Calculator
Jet Lag Planner
Reset your circadian clock using custom day-by-day light exposure/avoidance windows.
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Calculator
Biohacking Dashboard
Track your sleep animal, personalized supplement stacks, and active sleep schedules.
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Calculator
Shift Work Scheduler
Calculate optimal sleep blocks, anchor sleep, and light/dark exposure windows for night and rotating shifts.
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Calculator
Muscle Recovery Calculator
Calculate personalized sleep needs based on training intensity, volume, and muscle groups for optimal growth hormone.
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Calculator
Alcohol Sleep Clearance
Calculate your BAC decay curve and find the safest bedtime window to protect REM sleep cycles.
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Calculator
Beauty Sleep Calculator
Find your peak anti-aging repair hours and calculate your growth hormone sleep score.
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Calculator
Coffee Nap Planner
Time your caffeine dose and short nap perfectly to clear brain fog and double focus.
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Calculator
New Parent Sleep Sync
Coordinate shifts between parents to guarantee critical consolidated sleep windows during infant feeding cycles.
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Calculator
Sleep Debt Calculator
Track your weekly sleep deficit and get a personalized recovery plan to pay back your sleep debt.
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Calculator
Sleep Schedule Builder
Create a personalized 7-day sleep routine optimized for your lifestyle, work schedule, and chronotype.
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Quiz
Chronotype Quiz
Discover if you're a Lion, Bear, Wolf, or Dolphin — and optimize your entire day around your biology.
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Quiz
Sleep Hygiene Score
Interactive 10-point checklist to audit your sleep habits and get personalized improvement recommendations.
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Quiz
Sleep Apnea Quiz
Assess your clinical risk level for obstructive sleep apnea using the standard STOP-BANG questionnaire.
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Guide
Fall Asleep Fast
12 science-backed techniques including 4-7-8 breathing, military method, and progressive relaxation.
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Guide
Magnesium Glycinate
Evidence-based guide on the top sleep supplement — dosage, timing, mechanisms, and safety considerations.
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Guide
Insomnia Guide
Understand chronic insomnia causes and explore proven CBT-I strategies recommended by physicians.
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Guide
Sleep Deprivation
How sleep debt impacts your immune system, cognitive performance, mood, and long-term health risks.
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Guide
Sleep by Age
Science-backed sleep duration recommendations for every age group from newborns to seniors.
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Guide
How Much Sleep
Get personalized sleep duration recommendations based on your age, activity level, and lifestyle.
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Guide
Sleep Stages Guide
Understand NREM (Stage 1, 2, 3) and REM sleep cycle biology to optimize your waking patterns.
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Guide
Circadian Rhythm
Demystify your master body clock and how light, melatonin, and cortisol govern sleep-wake timing.
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Guide
Sleep Disorders Hub
Learn about the symptoms, physiological causes, and evidence-based treatments for sleep disorders.
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Guide
CPAP Therapy Guide
A complete guide to continuous positive airway pressure treatment, masks, and adaptation setups.
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Guide
Melatonin Guide
Discover the clinical guidelines for correct melatonin dosage, safe timing, and body clock resets.
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Guide
Sleep Positions Guide
Compare the health benefits and drawbacks of back, side, and stomach sleeping postures.
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Guide
Pregnancy Sleep Guide
Manage physical comfort, insomnia, and left-side sleeping postures trimester-by-trimester.
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Guide
Teen Sleep Guide
Learn the science of adolescent circadian shifts and how to schedule sleep for students.
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Guide
Menopause Sleep
Understand how estrogen decline and vasomotor hot flashes trigger nighttime sleep disruptions.
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Guide
Alcohol & Sleep
Analyze how ethanol intake disrupts sleep architecture, suppresses REM, and spikes heart rate.
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Guide
Exercise & Sleep
Maximize homeostatic sleep pressure and deep N3 stages using timed physical training.
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Guide
Bedroom Environment
Sanitize your sleep sanctuary using the 65°F temperature rule, light blockout, and sound coloring.
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Guide
Sleep Stages by Age
Explore how deep sleep depletes and sleep cycles change from infancy to senior years.
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How It Works
Three simple steps to transform your sleep quality forever
1
Choose Your Tool
Pick a calculator, quiz, or guide based on your specific sleep concern — bedtime timing, nap optimization, caffeine tracking, or more.
2
Get Instant Results
All calculations happen in your browser. No loading screens, no sign-ups, no data collection. Just immediate, science-backed answers.
3
Sleep Better Tonight
Apply your personalized recommendations. Wake up aligned with your natural sleep cycles and feel the difference from day one.
What People Are Saying
Join thousands who've improved their sleep with GoodSleep tools
★★★★★
I've been using the sleep cycle calculator for a month now and the difference is incredible. I wake up feeling actually refreshed instead of hitting snooze 5 times.
Night shift nurse
★★★★★
The kids sleep calculator was a game-changer for our family. Our toddler goes down so much easier now that we're timing bedtime to her natural cycles.
Parents of two
★★★★★
I never realized how much my afternoon coffee was destroying my sleep until I used the caffeine calculator. Cutting it off at 2 PM changed everything.
Software engineer
Ready to Transform Your Sleep?
Start with our most popular tool — the Sleep Cycle Calculator — and discover what waking up refreshed really feels like.
⏰ Calculate My Bedtime →