Bedtime Calculator: What Time Should I Go to Bed?
Use this bedtime calculator to find a realistic time to go to bed based on your wake-up time, preferred sleep duration, and how long you usually take to fall asleep.
Calculate Your Bedtime
Enter your wake-up time and choose how much sleep you want.
What time should I go to bed?
Most adults do best with 7 to 9 hours of sleep. If you wake up at 7:00 AM, common bedtime targets are around 11:15 PM for 7.5 hours of sleep or 9:45 PM for 9 hours of sleep, assuming about 15 minutes to fall asleep.
For 6 hours of sleep
This gives about 4 full sleep cycles. It may work occasionally, but many adults need more sleep for consistent energy.
For 7.5 hours of sleep
This gives about 5 full sleep cycles and is a common practical target for adults with busy schedules.
For 9 hours of sleep
This gives about 6 full sleep cycles and may suit people recovering from sleep debt or needing more rest.
How the Bedtime Calculator Works
Choose your wake-up time
Start with the time you need to get out of bed for work, school, family, or your daily routine.
Select your sleep duration
Choose 6, 7.5, or 9 hours. These options match 4, 5, or 6 estimated 90-minute sleep cycles.
Add sleep onset time
Most people do not fall asleep instantly, so the calculator subtracts your estimated time to fall asleep.
Use the result as a planning guide
Your result is a practical bedtime target, not a medical diagnosis or strict rule.
Bedtime Calculator FAQ
What is a bedtime calculator?
A bedtime calculator helps you estimate what time to go to bed based on your wake-up time, sleep duration, and time to fall asleep.
What time should I go to bed if I wake up at 6 AM?
If you wake up at 6 AM, a 7.5-hour sleep target with 15 minutes to fall asleep suggests around 10:15 PM.
What time should I go to bed if I wake up at 7 AM?
If you wake up at 7 AM, a 7.5-hour target with 15 minutes to fall asleep suggests around 11:15 PM.
Should I choose 7.5 or 9 hours?
Choose 7.5 hours if you need a practical adult sleep target. Choose 9 hours if you feel tired, are recovering from sleep debt, or need more rest.
Is this bedtime calculator medical advice?
No. It is a general planning tool. Speak with a qualified healthcare professional if you have insomnia, sleep apnea, chronic fatigue, or other health concerns.