Welcome to Sleep Cycle Helper — your simple guide to waking up refreshed.
We use the science of 90-minute sleep cycles to calculate the best times to go to bed or wake up. Whether you're planning a power nap or setting your alarm for the morning, our tool helps you avoid groggy mornings by timing your sleep smarter.
Every sleep cycle moves through light, deep, and REM stages. If you wake up in the middle of a cycle, you’re more likely to feel tired. But if you wake at the end of a cycle — even after less total sleep — you can feel more alert and rested.
Our free sleep calculator takes the guesswork out of it. Just tell us when you want to wake up (or go to bed), and we’ll suggest times that match full sleep cycles, plus time to fall asleep.
Go to bed and wake up at the same time every day — even on weekends. Your body’s internal clock (circadian rhythm) works best with consistency.
The light from phones, tablets, and TVs can block melatonin — the hormone that helps you fall asleep. Try dimming lights and unplugging at least 30 minutes before bed.
Caffeine can linger in your system for up to 8 hours. And while alcohol may help you fall asleep faster, it disrupts REM sleep later in the night.
Make your bedroom quiet, cool, and dark. Use blackout curtains, white noise, and comfortable bedding to support uninterrupted sleep.
Train your brain to associate your bed with sleep — not work, emails, or scrolling through your feed.
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