What does this tool do?
Hours are useful for newborn milestones, project timelines and curiosity. The result combines the calendar-day difference with the difference between the two times of day.
The Formula
Total hours = days between dates × 24 + (reference hour − birth hour)Frequently Asked Questions
Why do I need the hour of birth?
A day count alone cannot account for the time of day. Entering both hours makes the total exact to the hour rather than rounded to midnight.
Can I calculate the age at a future date?
Yes. Set the reference date to a future date; the calculation requires the reference date to be on or after the birth date.