Sleep Calculator
Find the best bedtime or wake-up time based on 90-minute sleep cycles so you wake up refreshed.
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Tool Coming Soon
This tool is under development. The admin has created the tool entry, but the functionality file hasn't been added yet.
File expected: tools/sleep-calculator.php
About Sleep Calculator
Sleep Calculator - Wake Up Refreshed
Use the science of 90-minute sleep cycles to plan your sleep. Tell us when you need to wake up and we will show the ideal bedtimes, or enter your bedtime to get the best alarm times — so you always wake during light sleep instead of a deep cycle.
Why Use Our Sleep Calculator?
- Cycle-Based — Based on 90-minute REM cycles
- Two Directions — Bedtime or wake-up planning
- Fall-Asleep Time — Accounts for how long you take
- Instant Results — Four suggested times at once
- Free — No signup, nothing stored
How to Use the Sleep Calculator
- Choose whether to plan a wake-up time or a bedtime
- Enter your target time and how long you take to fall asleep
- Pick one of the suggested times and sleep better
Ideal for shift workers, students, parents, and anyone who wants more restful sleep.