Convert a baby's age in months into weeks, days and stage.
The age in months is converted to years, weeks and days using the average lengths of a month, then matched to a broad developmental stage. Growth expectations change quickly in the first year, so a clear age readout helps parents track milestones and feeding windows.
Baby Age
Years = months / 12; weeks = months x 4.345; days = months x 30.437
Years = months / 12; weeks = months x 4.345; days = months x 30.437 The age in months is converted to years, weeks and days using the average lengths of a month, then matched to a broad developmental stage.
Growth expectations change quickly in the first year, so a clear age readout helps parents track milestones and feeding windows.
This calculator takes 1 input: Age in months. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.