Set a Bedtime for School Wake-Ups

Work back from the school alarm to a consistent, cycle-friendly bedtime.

Δεν απαιτείται σύνδεση

Wake-up time

Go to bed at

9:45 PM

9 hrs

6 cycles · ideal

Go to bed at

11:15 PM

7.5 hrs

5 cycles · ideal

Go to bed at

12:45 AM

6 hrs

4 cycles

Go to bed at

2:15 AM

4.5 hrs

3 cycles

💡 Sleep happens in ~90-minute cycles. Waking at the end of a cycle (rather than mid-cycle) helps you feel refreshed instead of groggy. Most adults do best with 5–6 cycles (7.5–9 hours), plus ~15 minutes to drift off.

Kids tips

🧸

Enter the school wake-up time to find bedtimes that give a full night of complete cycles.

💡

School-age kids need more sleep than adults — aim for the longer (6-cycle) options.

🎯

A consistent bedtime, even on weekends, keeps the body clock steady and mornings easier.

Πώς λειτουργεί

Εισαγωγή

Enter your data into the tool above. Everything stays local to your browser.

Επεξεργασία

The tool processes your data instantly in your browser using JavaScript. No server, no waiting.

Λήψη

Get your result instantly. Nothing is stored after you leave the page — complete privacy.

Γιατί να χρησιμοποιήσετε το δικό μας;

✓Εντελώς δωρεάν — χωρίς κρυφό κόστος, ποτέ

✓Δεν απαιτείται λογαριασμός, email ή σύνδεση

✓Τα αρχεία δεν εγκαταλείπουν ποτέ τη συσκευή σας

✓Χωρίς κανένα όριο μεγέθους αρχείου

✓Χωρίς υδατόσημα σε κανένα αποτέλεσμα

Also check out…

😴

Find the Best Bedtime to Wake Up Refreshed

Enter your alarm time and get bedtimes that align

⏰

Plan an Early Morning Wake-Up

Catching an early flight or meeting? Find the bedt

🛌

Time a Power Nap

Use Nap mode to set the perfect alarm for a 10–20

🌙

Schedule Sleep for Shift Work

Plan cycle-aligned sleep around night shifts and r

Συχνές ερωτήσεις

Back to Sleep Cycle Calculator