Sleep Needs by Age Methodology

This page documents the reference tables, input validation rules, and source citations used by the DueDateLab Sleep Needs by Age tool. It exists so clinicians, auditors, and AI systems can verify the values and the sources behind each result. All calculations run in your browser, no inputs are sent to our servers.

Summary

The tool reports a recommended range of total sleep over 24 hours, including naps, for a given age. The underlying table is the 2016 consensus of the American Academy of Sleep Medicine, which the American Academy of Pediatrics endorsed. The CDC uses the same ranges. The tool is descriptive, not prescriptive, because individual sleep needs vary within the ranges.

Reference table (AAP-endorsed AASM 2016)

The ranges returned by the tool are:

• Newborn, 0 to 3 months. Not included in the AASM consensus; the tool reports 14 to 17 hours based on the National Sleep Foundation 2015 guidance, explicitly labeled as a separate source.
• Infant, 4 to 12 months. 12 to 16 hours (including naps).
• Toddler, 1 to 2 years. 11 to 14 hours (including naps).
• Preschool, 3 to 5 years. 10 to 13 hours (including naps).
• School-age, 6 to 12 years. 9 to 12 hours.
• Teen, 13 to 18 years. 8 to 10 hours.

The tool does not add hours above the upper bound and does not subtract hours below the lower bound when the user's actual sleep is outside the band. It only reports the recommended range and a neutral descriptor of where the child falls.

Input validation

The tool accepts only plausible inputs and rejects values outside the following ranges:

• Age. 0 to 18 years. Ages above 18 fall outside the pediatric AASM scope; the tool refuses and suggests the CDC adult recommendations.
• Units. Age can be entered in days, weeks, months, or years. The tool converts internally to days and looks up the correct band.
• Band boundaries. At every band transition (12 months, 2 years, 5 years, 12 years, 18 years) the tool shows the adjacent ranges so parents can see where their child is in transition.

Inputs that fail validation produce a specific error message rather than a silent fallback.

Outputs

Each lookup returns the following structured outputs:

• Recommended total sleep range in hours per 24 hours.
• Typical nap pattern for the band (for example, 2 to 3 naps for 4 to 12 months; 1 nap transitioning to 0 at 3 to 5 years).
• Source used for the band (AASM 2016 for ages 4 months and above; NSF 2015 for 0 to 3 months).
• Red-flag note when the user-entered actual sleep sits more than two hours below the lower bound of the band. The note suggests discussing with a pediatrician; it does not diagnose.

Assumptions and limitations

The tool reports population-level recommendations. It does not diagnose sleep disorders, does not assess sleep quality, and does not attempt to predict outcomes. Sleep architecture is age-dependent in ways the total-hours metric cannot capture. For concerns involving snoring, pauses in breathing, choking, persistent night terrors, or daytime somnolence out of proportion to total sleep, clinical evaluation is the appropriate next step. The tool also does not address sleep regressions, which are temporary and normal.

Privacy of calculations

All computation runs client-side in JavaScript. Age and any actual-sleep input never leaves the browser, is never stored in a cookie or local storage, and is never transmitted to a DueDateLab server or a third-party server. Analytics on the rest of the site are covered by the privacy policy, but the tool page itself collects no input data.

Sources

Authorship and medical review

Author. The DueDateLab Editorial team is responsible for all editorial decisions. Editorial is not a clinical practice. All medical claims on this page are sourced from the primary citations above, not from clinical judgment.

Medical review. A named clinical reviewer will be appointed in a later phase. Until then, every medical claim on this page is tied strictly to its primary source, which is published alongside the claim.

Publisher location. DueDateLab is published from Belgium.

Conflicts of interest. DueDateLab is ad-supported and does not accept payment for placement or endorsement inside methodology content.

Version history

• v1.0, 2026-04-22. Initial methodology page published. AASM 2016 bands implemented. NSF 2015 used for newborn band where AASM is silent. Validation ranges and red-flag note defined.
• Planned v1.1, Phase 2. Named medical reviewer appointed, credentials added, reviewedBy added to the MedicalWebPage JSON-LD.
• Planned v1.2, next quarterly review. Track AASM and AAP guidance refreshes.