Sleep Cycles Calculator
Health & FitnessCalculate the ideal bedtime to wake up feeling rested, based on 90-minute sleep cycles.
Recommended Bedtime
The bedtime that lets you wake up at the end of a full sleep cycle, including 15 minutes to fall asleep.
Found this calculator useful?
From Scratch To $10K/Month In 60 Days
This is a proven money making system that takes students by the hand to make at least $10,000 per month, every month. Students get 12 weeks of guided coaching in addition to the "MPS Super Funnel" and tools.
We value your privacy and promise not to sell or misuse your information. Here's our privacy policy.
Calculator Stats
Creators
Odeh Ahwal0people find this calculator helpful
Views
Helpful
Saved
Embeds
Calculator Stats
Creators
Odeh Ahwal0people find this calculator helpful
Views
Helpful
Saved
Embeds
Health & Fitness calculators
Frequently Asked Questions
Why are sleep cycles about 90 minutes?
A complete sleep cycle (moving through light sleep, deep sleep, and REM sleep) averages around 90 minutes for most adults, and waking up at the end of a cycle (rather than mid-cycle) generally feels less groggy.
Why add 15 minutes to the calculation?
Most people don't fall asleep instantly — 15 minutes is a typical average time to fall asleep after going to bed, so it's added to ensure your sleep cycles actually complete by your intended wake time.
How many cycles should I aim for?
5 cycles (about 7.5 hours) is commonly recommended for most adults, though individual sleep needs vary — some people feel best with 6 cycles (9 hours), especially during high-stress or high-activity periods.
Spot a mistake? Tell us what's wrong.
Request a calculator. The most-requested ones get built first in our monthly batch.
Request a calculatorWant this calculator on your website?
Embed the Sleep Cycles Calculator on any site — no code needed. Customize colors, remove branding, and track usage.
