Sleep Diary Template
Last updated: August 2026
A sleep diary records when you slept, how you slept, and how the next day went. Two minutes a morning, and the most useful thing you can bring a doctor about your sleep — because memory is a terrible witness. Lying awake distorts time, and almost everyone misjudges how long they slept.
Here's the template, what to fill in, why clinicians ask for two weeks, and how a diary is used alongside a sleep study.
The template
One row per night, filled in the next morning — everything a clinician needs and nothing they don't:
| Date | To bed | Lights out | Asleep by (est.) | Wake-ups | Final wake | Out of bed | Time slept | Quality 1–5 | Naps | Notes |
|---|---|---|---|---|---|---|---|---|---|---|
| Mon 8/3 | 22:40 | 23:10 | 23:45 | 2 (~25 min) | 06:20 | 06:35 | 6h 10m | 2 | — | Coffee 4pm, wine with dinner |
| Tue 8/4 | 23:00 | 23:05 | 23:20 | 1 (~5 min) | 06:30 | 06:35 | 7h 05m | 4 | — | Gym 18:00, felt sharp all day |
| Wed 8/5 | 00:15 | 00:20 | 01:10 | 3 (~40 min) | 06:25 | 06:50 | 4h 35m | 1 | 20 min, 15:00 | Deadline, mind racing |
Too many columns? Cut it down — a five-column diary you keep for fourteen days beats an eleven-column one abandoned on day four. Non-negotiable: lights out, final wake time, and a quality rating.
What to record each morning
Fill it in within half an hour of rising, before the night blurs.
- To bed vs lights out — two different times; forty minutes of nightly scrolling in bed is itself a finding.
- Asleep by — a guess is fine; clinicians expect one.
- Wake-ups — how many, and roughly how long in total; "3 (~40 min)" is enough.
- Final wake and out of bed — a long gap between them is one of the habits that keeps insomnia alive; see insomnia causes.
- Time slept — time in bed minus time awake in it; the number that gets averaged.
- Quality 1–5 — how restored you felt, not how long you slept; subjective is the point.
- Naps — length and time; late or long ones cut the next night's sleep pressure.
- Notes — where the answers hide: caffeine, alcohol, exercise, medication, stress, next-day sleepiness, morning headaches, snoring your partner mentioned.
One rule: don't clock-watch — checking the time repeatedly makes both your sleep and your diary worse. Turn the clock away; estimate in the morning — that's how clinicians read it.
The two-week rule
Fourteen consecutive nights is the standard ask, and not for roundness:
- Single nights are noise — a pattern needs enough nights to separate itself from a stressful Tuesday.
- It captures weekdays and weekends, twice — the weekday-weekend gap (social jetlag) is one of a diary's most common, most fixable findings.
- It gives a baseline — a credible "before" for whatever you change next.
Include the bad nights — a diary edited to look respectable sends your clinician down the wrong path. Missed a morning? Leave the row blank: a gap is honest data, an invented row isn't.
At the end, work out average time slept, average time in bed, and sleep efficiency (time asleep over time in bed). Above roughly 85% is considered healthy; much lower means too much time in bed for the sleep you're getting — the pattern behavioral treatment targets.
How clinicians use a sleep diary
Clinics ask for a week or two of diary alongside testing — it answers questions no single lab night can.
Before a sleep study, it establishes your normal: a study measures one or two nights; the diary says you average five and a half hours, or that your bedtime swings by three hours.
To tell conditions apart. Insufficient sleep: too few hours at normal quality. Circadian disorder: good sleep at the "wrong" clock times. Insomnia: long sleep-onset or long awakenings. Unexplained awakenings plus daytime sleepiness suggest a breathing problem — see sleep apnea signs.
To run treatment. Behavioral insomnia treatment runs on diary numbers — prescribed time in bed is set from your average sleep time and widened as efficiency improves. On CPAP therapy, the diary sits beside the machine's usage data: hours run versus how you slept and felt.
Bring the whole thing, not a summary — your clinician wants the spread and the outliers.
Paper vs app: an honest comparison
Paper works: this template by the bed, a pen, two minutes a morning. The cost comes after the fourteenth morning — nobody averages fourteen nights by hand or computes efficiency twice, patterns hide inside columns of times, and three months later the sheet is gone.
Sleep & CPAP Feeltracker is this template, automated. A manual diary, not a sleep-stage tracker — it doesn't listen to the room or guess your stages: sleep and wake times with time slept calculated, quality ratings, notes and dreams, CPAP usage logging, charts and trends, and export to PDF, XLSX, CSV or JSON for the clinic. Reminders, widgets, Apple Health sync, iCloud sync with no account, and AI insights on your history (free, with optional premium).
Start tonight, not on a "normal" week — there's no such thing, and the diary you begin today is two weeks ahead of the one you're waiting to start.
Frequently asked questions
How long should I keep a sleep diary?
Two consecutive weeks is the standard: it captures weekdays and weekends twice and lets a pattern separate itself from a couple of bad nights. One week is the minimum most clinicians will work from; longer is useful when tracking the effect of a change.
What if I don't know exactly when I fell asleep?
Estimate — that's what everyone does, and what clinicians expect. Deliberately don't watch the clock during the night: checking the time repeatedly makes both your sleep and your diary worse. Fill the row in from your best guess within half an hour of getting up.
Should I record bad nights?
Especially the bad nights. A tidied-up diary is worse than none, because it points your clinician at the wrong problem. If you miss a morning entirely, leave the row blank rather than reconstructing it days later.
What is sleep efficiency and what's a good number?
Time actually asleep divided by time in bed, as a percentage. Above roughly 85% is generally considered healthy. A much lower figure usually means you're spending more time in bed than you're sleeping — the exact pattern that behavioral treatment for insomnia is designed to correct.
Does a sleep diary replace a sleep study?
No — they answer different questions and clinics use both. A study measures your breathing, oxygen and brain activity for a night or two; a diary shows your habitual pattern across weeks. If a breathing problem is suspected, only a study can confirm it; see sleep apnea signs.