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Sleep by age

Everything you need to navigate sleep from birth to five years. Start with our interactive tools or browse by stage.

Interactive tool

Bedtime calculator

Enter age, wake time and last nap — get tonight's ideal bedtime instantly.

Calculate bedtime
Interactive tool

Wake window calculator

Pick your child's age and wake time — get a full day schedule, nap by nap.

Find wake windows
Evidence base

Research & statistics

Sourced data on infant sleep problems, parent sleep deprivation, postpartum depression, and what professional support costs across Europe — with full citations for journalists, bloggers, and sleep professionals.

Read the research

Dealing with a regression?

Deep dives into the 4, 8, 12, 18-month and 2-year sleep disruptions.

Methodology grounded in paediatric sleep research and evidence-based clinical practice. Schedule data, wake window recommendations, and regression timelines are derived from published guidelines including those of the American Academy of Sleep Medicine (AASM), the National Sleep Foundation, and paediatric sleep research published in peer-reviewed journals.

Read our full methodology