Baby Sleep Calculator

The Baby Sleep Calculator totals night sleep and naps for babies and toddlers in the supported age range.

Enter the relevant clock times and durations, choose Calculate, then read the day labels, assumptions, and warnings before using the schedule.

• Total nighttime sleep plus naps.
• Compare 4-12 month and toddler ranges where applicable.
• Keep adult cycle math out of baby sleep totals.

Total 24-hour sleep equals estimated nighttime sleep plus total nap sleep. Babies below four months are totaled without a fixed range classification.

• Clock times are converted to minutes from midnight.
• Intermediate calculations may go below 0 or above 1,440 minutes so previous-day and next-day labels are preserved.
• Display format is applied only after the schedule is calculated.

The key assumptions are fall-asleep duration, target sleep duration or cycle duration, and the selected age reference when one is used.

Cycle boundaries are labeled as estimates. They are not presented as confirmed sleep-stage transitions.

At 8 months, 10 hours of night sleep plus three 1-hour naps totals 13 hours in 24 hours.

The total is a broad planning number. It does not predict development, sleep training progress, or whether a baby should sleep through the night.

Infant sleep varies substantially, especially below four months. Pediatric guidance is more important than calculator output when concerns exist.

Use these limits when reading any NexaCalc sleep result.

• The calculator works with clock times and user-entered assumptions. It does not measure sleep stages.
• A 90-minute sleep cycle is a planning convention. Individual cycles vary across the night and across people.
• Results do not guarantee alertness, sleep quality, recovery, or safety.

This calculator does not replace pediatric guidance. For infants, safe sleep guidance emphasizes back sleep, a firm flat noninclined surface, a fitted sheet, and keeping soft bedding out of the sleep space.

• Place infants on their backs for sleep.
• Use a firm, flat, noninclined sleep surface.
• Use a fitted sheet.
• Keep loose blankets, pillows, soft toys, and bumpers out of the sleep space.

NexaCalc does not provide sleep-training methods, feeding plans, medication guidance, or claims about sleeping through the night.

For babies below four months, the calculator totals the entered sleep but does not compare it with a fixed target range.

For 4-12 months and 1-2 years, the page uses the centralized NexaCalc sleep-reference data rather than duplicating age ranges in the calculator component.

Nap entries are added to nighttime sleep for a 24-hour total. The calculator does not decide how naps should be distributed across the day.

Feeding difficulty, breathing concerns, unusual sleepiness, poor growth, or caregiver safety concerns should be discussed with a pediatric professional.

• Centers for Disease Control and Prevention: About Sleep, age-based sleep-duration table, reviewed May 15, 2024. Source.
• American Academy of Pediatrics: Safe Sleep recommendations and family resources, last updated July 7, 2025. Source.
• Paruthi S, Brooks LJ, D'Ambrosio C, et al. Recommended amount of sleep for pediatric populations. Journal of Clinical Sleep Medicine, 2016. Source.
• National Institute of Neurological Disorders and Stroke: Brain Basics, Understanding Sleep, reviewed February 25, 2025. Source.
• National Heart, Lung, and Blood Institute: Sleep Deprivation and Deficiency, updated March 24, 2022. Source.

Sleep reference data reviewed against CDC/AASM/AAP/NIOSH source families on June 21, 2026.