Free tools
Calm baby calculators
Quick, private calculators for the questions every new parent Googles — wake windows, feeding amounts, growth percentiles and milestones. Free, no sign-up, and nothing leaves your device.
Wake Window Calculator
Age-typical wake windows and a suggested nap rhythm for the rest of today.
Baby Feeding Amount Calculator
Estimate typical bottle sizes and total daily milk by your baby's age and weight.
Baby Growth Percentile Calculator
Check weight, length and head-circumference percentiles on WHO & CDC charts.
Baby Milestone Timeline
See upcoming milestone, leap and feeding stages from a due date or birthday.