Convert durations from milliseconds through seconds, hours, days, weeks, average months, and 365-day years.
The month option uses an average Gregorian month of about 30.4375 days (~2,629,743 seconds), not “calendar months” that vary from 28–31 days.
This converter’s year unit is a common 365-day year (31,536,000 s). It does not automatically insert leap days — use the Age Calculator for calendar-aware date spans.
No. This tool converts duration lengths only. Use the Time Zone converter to compare local clock times between regions.