Everything you need to plan better sleep — from bedtime calculators to in-depth guides on schedules, disruptors, and special situations. Start with a calculator, then go deeper with a guide.
Sleep Calculator
Find the best bedtime or wake-up time using 90-minute sleep cycles.
Sleep Cycle Calculator
See exactly which cycle stage you'll wake in based on your bedtime.
Best Time to Go to Bed
Enter your wake-up time and get the optimal bedtime window.
Power Nap Calculator
Pick the right nap length — 10, 20, or 90 minutes — for your goal.
Caffeine Cutoff Calculator
Find your last safe coffee time so caffeine doesn't delay sleep.
Jet Lag Planner
Get a day-by-day light, sleep, and meal plan to beat jet lag fast.
Sleep Latency Calculator
Estimate how long it takes you to fall asleep and adjust your bedtime.
Wake Window Calculator
Plan awake time between sleeps to improve sleep pressure and timing.
Sleep Schedule Calculator by Wake-Up Time
Build a bedtime backwards from your alarm. Includes sleep duration table, sleep latency buffer, and weekend rules.
GuideAre Sleep Cycles Always 90 Minutes?
Understand what cycle calculators actually estimate and how to use cycle timing without over-trusting it.
GuideNight Owl Sleep Schedule
Plan a better schedule around your chronotype with gradual shifts, morning light, and caffeine timing.
GuideMorning Light for Sleep
The sleep habit that starts after you wake up — how to use outdoor light to anchor your rhythm.
GuideWeekend Sleep Schedule
Recover sleep on weekends without shifting your body clock so far that Monday becomes harder.
How to Recover From Sleep Debt
Gradual recovery strategies using earlier bedtimes, naps, and weekend limits.
GuideHow Long Should I Nap?
Compare 20-minute, 30-minute, and 90-minute naps. Learn which length fits each situation.
GuideSleep Schedule for Night Shift Workers
Anchor sleep, light control, caffeine timing, and days-off transitions for night-shift workers.
GuideWhen to See a Doctor for Sleep Problems
Warning signs that go beyond a schedule fix: snoring, gasping, drowsy driving, persistent insomnia.
When to Stop Drinking Caffeine Before Bed
Cutoff table by bedtime and sensitivity. Hidden caffeine sources and how to test your own limit.
GuideEvening Habits That Affect Sleep
Dinner timing, alcohol, late workouts, and bright screens — what to change and when.
GuideBedroom Setup for Better Sleep
Practical checklist for light, noise, temperature, and phone rules. 10-minute reset plan included.
GuideHow to Use a Sleep Tracker
Use your wearable for weekly pattern analysis without obsessing over daily scores.
Jet Lag Sleep Plan
Destination-time strategy, eastbound vs. westbound tips, and what to do before, during, and after travel.
GuideTeen Sleep Schedule for School Mornings
Realistic bedtime examples, homework cutoffs, screen limits, and weekend catch-up tips for teens.
GuideAre Sleep Cycles Always 90 Minutes?
Why the 90-minute rule is a useful starting point — and how individual cycles vary from 70 to 120 minutes.
Educational use only. All guides on this site are for general sleep-planning education and are not medical advice. Consult a qualified healthcare professional for persistent sleep problems.