Before we can do anything, we need a good night's rest.

When Should Your Head Hit That Pillow?

Taking into account that it takes an average of 15 minutes to fall asleep, this calculator will tell you when you should be snug in bed.

The amount of sleep needed varies by age. Newborns need the most sleep, while adults need the least. As a general guideline, here's how much sleep people need by age:

• Newborns (0-3 months): 14-17 hours
• Infants (4-11 months): 12-16 hours
• Toddlers (1-2 years): 11-14 hours
• Preschoolers (3-5 years): 10-13 hours
• School-aged children (6-12 years): 9-12 hours
• Teenagers (13-18 years): 8-10 hours
• Adults (18-64 years): 7-9 hours
• Older adults (65+ years): 7-8 hours