Find the ideal bedtime or wake-up time with this free sleep calculator, built around natural 90-minute sleep cycles. Waking up between cycles — not mid-cycle — leaves you feeling more rested, even with the same total sleep. Pick a wake-up time to see your best bedtime options, or calculate your ideal wake-up time if you’re heading to bed now. Both account for the ~15 minutes it takes to fall asleep.
What time do you want to wake up?
Bedtime
Most people take about 15 minutes to drift off after getting into bed.
To wake up refreshed at 7:30 AM, you need go to sleep at one of the following times:
Waking up at one of these times means you’ll surface between complete 90-minute sleep cycles, not in the middle of one.
A healthy night’s rest typically includes 5 to 6 full sleep cycles.
If you want to go to bed now...
Wake-up Time
Find the best time to get up if you fall asleep right now.
Wake-up Time
Falling asleep usually takes about 15 minutes.
Sleeping now means the best times to wake up are:
These times land you between full 90-minute sleep cycles, not in the middle of one.
Aim for 5–6 cycles for a fully rested night.
Tips for Better Sleep
- Keep a consistent schedule. Going to bed and waking up at the same time daily — even on weekends — helps regulate your body's internal clock.
- Avoid screens before bed. Blue light from phones and laptops can delay your body's natural release of melatonin.
- Watch your caffeine cutoff. Caffeine can stay in your system for 6+ hours, so an afternoon coffee may still affect sleep at night.
- Keep your room cool and dark. A cooler bedroom (around 65°F / 18°C) supports deeper, more restorative sleep cycles.
- Don't oversleep to "catch up." Waking up mid-cycle after sleeping in can leave you groggier than sleeping less but waking between cycles.