Sleep in 90-minute cycles — find bedtimes for your wake-up time, or wake-up times if you sleep now.
🛏️ Best times
Each cycle is 90 minutes, plus about 15 minutes to fall asleep. Waking at the end of a cycle — not in the middle of one — is what helps you feel fresh.
🔒 Private by design: this tool runs 100% in your browser — nothing is uploaded anywhere.
Why waking up groggy happens
Sleep runs in roughly 90-minute cycles. Waking in the middle of a deep cycle feels awful; waking at the end of one feels much fresher, even with slightly less total sleep. Counting backwards from your alarm in whole cycles is the simplest way to pick a better bedtime.
Frequently asked questions
How many cycles do adults need? Most adults feel best with 5 or 6 cycles — about 7.5 to 9 hours in bed.
Why add 15 minutes? Most people need around 15 minutes to fall asleep after getting into bed.
Word Counter
Count words, characters, sentences and paragraphs instantly as you type — free and private.
📊 Counts
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Reading time–
🔒 Private by design: this tool runs 100% in your browser — nothing is uploaded anywhere.
Free online word counter
This free word counter counts words, characters, sentences and paragraphs live as you type. Students, bloggers and job applicants use it to hit essay and form word limits without installing anything.
It also estimates reading time and lets you copy the counts in one tap. Everything runs on your device, so your text stays private.
How to use
Type or paste your text into the box above.
Watch the counts update live — words, characters, sentences and more.
