Baby Sleep Calculators
Science-backed tools to help you understand your baby's sleep at every age. No sign-up, no subscriptions. Just answers.
Wake Window Calculator
Find your baby's ideal awake time between sleeps based on their exact age. Avoid overtiredness with science-backed ranges — and get the precise time for the next nap.
- ✓Personalised wake window
- ✓Next nap start time
- ✓Age-specific tips
Nap Schedule Generator
Build a complete day schedule from morning wake to bedtime. Enter your baby's age and first wake time — get all nap start/end times and a recommended bedtime instantly.
- ✓Full daily schedule
- ✓Bedtime included
- ✓Circadian-rhythm aligned
Bedtime Calculator
Calculate the earliest, recommended, and latest bedtime window based on when the last nap ended and your baby's age. Stop guessing when to start the bedtime routine.
- ✓Earliest / ideal / latest window
- ✓Wind-down start time
- ✓Night sleep science
Sleep Debt Calculator
See exactly how much sleep your baby is missing today. Get a personalised adjusted bedtime to repay the deficit — and understand the impact before it snowballs.
- ✓Sleep debt in hours/minutes
- ✓Adjusted bedtime suggestion
- ✓AAP target reference
Sleep Regression Predictor
Know if you're in a regression right now — and predict the next one before it hits. Covers all major regressions from 4 months to 2 years with causes, signs, and survival tips.
- ✓Active regression detection
- ✓Next regression preview
- ✓Cause & duration info
Nap Length Guide
Find out what a normal nap looks like at your baby's exact age — with a visual range so you can stop worrying about every short sleep. Includes short nap causes and fixes.
- ✓Normal range by age
- ✓Short nap checklist
- ✓45-min cycle explained
How it works
No guesswork. Just your baby's age and a few simple inputs.
Step 01
Enter baby's age
All formulas adapt to developmental stages from newborn to preschool age.
Step 02
Get instant results
No server, no wait. Calculations happen right in your browser.
Step 03
Plan your day
Use wake windows and nap times to build a gentle, flexible routine.
📱
Track your baby's sleep automatically
These calculators are great for planning. takes it further — log naps and nights, spot patterns, and get personalised suggestions over time.
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Medical disclaimer: MomMade calculators are for informational purposes only and not a substitute for professional medical advice. Always consult your pediatrician or a certified sleep consultant for personalised guidance. Results are based on general developmental guidelines and may not apply to premature babies or those with medical conditions.