Time Conversions
8 units · 56 converters
Convert between milliseconds, seconds, minutes, hours, days, weeks, months and years. Exact SI-based factors, with standard averages for months and years.
Millisecond(ms)
A millisecond is one thousandth of a second, the typical scale of computer response times and camera flashes. Network latency and frame durations are measured in milliseconds.
Second(s)
The second is the SI base unit of time, defined by the cesium-133 atomic transition frequency of 9,192,631,770 hertz. It is the foundation of all time measurement.
Minute(min)
A minute equals 60 seconds, or 1/60 of an hour. It is the everyday unit for meetings, cooking times and sports.
Hour(h)
An hour equals 60 minutes or 3,600 seconds, dividing the day into 24 parts. Work schedules, travel times and billing are commonly expressed in hours.
Day(d)
A day equals 24 hours or 86,400 seconds, approximating one rotation of the Earth. Calendars, deadlines and project plans are built on days.
Week(wk)
A week equals 7 days or 604,800 seconds. It is the standard cycle for work schedules and calendar planning, independent of month lengths.
Month(mo)
A month is the approximate period of the Moon's orbit, but calendar months vary from 28 to 31 days. For conversions this tool uses the Gregorian average of 30.436875 days.
Year(yr)
A year is the period of Earth's orbit around the Sun. This tool uses the Gregorian average of 365.2425 days, which matches the calendar over the 400-year leap cycle.