Time Duration Converter
Convert durations between seconds, minutes, hours, days, weeks, months, years, and sub-second units.
Run tool
This online time duration converter translates measurements across standard time units, ranging from nanoseconds to calendar years. When you enter a duration and choose your starting and target units, the tool computes the converted numeric total rounded to ten decimal places alongside an intuitive breakdown into days, hours, minutes, and seconds. The tool uses fixed conversion standards: a calendar year represents 31,557,600 seconds (based on an average year length of 365.25 days), a month corresponds to 2,629,800 seconds (one-twelfth of an average year), and a week equals 604,800 seconds. Sub-second increments support precision calculations down to milliseconds, microseconds, and nanoseconds. If you do not enter a numeric amount, the converter defaults to zero. Choosing matching or different units allows rapid verification of schedules, media runtimes, computing latency intervals, and scientific logs. The breakdown display omits larger zero-value units to keep duration summaries clear and readable.
Instructions
- Enter the duration amount into the value field, or leave it blank to default to 0.
- Select your source time unit from the from unit dropdown menu.
- Select your target time unit from the to unit dropdown menu.
- Review the calculated numeric result rounded to 10 decimal places and the formatted duration breakdown.
Examples
- Convert 2.5 hours to minutes: enter 2.5 in Value, select Hours for From unit and Minutes for To unit to get 150 minutes (breakdown: 2 hours, 30 minutes).
- Convert 86,400 seconds to days: enter 86400 in Value, select Seconds for From unit and Days for To unit to get 1 day (breakdown: 1 day).
- Convert 500 milliseconds to seconds: enter 500 in Value, select Milliseconds for From unit and Seconds for To unit to get 0.5 seconds.
FAQ
What fixed values are used for month and year conversions?
A year is defined as 31,557,600 seconds (365.25 days of 86,400 seconds each), and a month is defined as one-twelfth of that year, equal to 2,629,800 seconds (30.4375 days).
How does the duration breakdown format the output?
The breakdown expresses the total time in days, hours, minutes, and seconds. Larger units with a value of zero are omitted, while seconds remain visible when no larger units apply.
How precise is the numeric conversion?
The converted numeric total displays with precision rounded up to 10 decimal places.
Which sub-second units are available?
You can convert between milliseconds (0.001 seconds), microseconds (0.000001 seconds), and nanoseconds (0.000000001 seconds).