Baby Sleep Schedule Calculator

Work out baby sleep schedule instantly with clear inputs, formula shown and shareable results.

About Baby Sleep Schedule Calculator

Recommended 24 hour sleep is taken from the usual age bands, daytime naps are subtracted to leave the night requirement, and bedtime is the wake time counted back by that many hours. Bedtime is a consequence of nap length, not an independent choice: a long late nap mathematically pushes bedtime later if the total is to be met.

Formulas

Night sleep

night sleep = recommended 24h sleep - daytime nap sleep

Bedtime

bedtime = wake time - night sleep, wrapped into a 24 hour clock

Worked example

With the default values below, Baby Sleep Schedule Calculator returns Recommended total sleep in 24h of 13.00. Change any input above and every figure here is recalculated in your browser.

Inputs used

Baby's ageminimum 0.5 months: 6 months
Daytime nap sleepminimum 0 h: 3 h
Morning wake time (24h clock)accepts 0–23: 7

Results

Recommended total sleep in 24h: 13.00 h
Night sleep still needed: 10.00 h
Suggested bedtime: 21:00
Awake time in the day: 11.00 h

Step by step

1Values used
2Night sleep
3Bedtime
4Recommended total sleep in 24h= 13.00 h
5Night sleep still needed= 10.00 h
6Suggested bedtime= 21:00
7Awake time in the day= 11.00 h

Assumptions and limits

The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is the Baby Sleep Schedule figure worked out?

night sleep = recommended 24h sleep - daytime nap sleep. Recommended 24 hour sleep is taken from the usual age bands, daytime naps are subtracted to leave the night requirement, and bedtime is the wake time counted back by that many hours.

Why does this matter?

Bedtime is a consequence of nap length, not an independent choice: a long late nap mathematically pushes bedtime later if the total is to be met.

What do I need to enter?

Enter baby's age, daytime nap sleep, morning wake time (24h clock). The defaults shown are a realistic worked example — swap in your own figures to get a result you can use.