Time Duration Converter
Convert between different time scales: from milliseconds to years
Equivalent Durations
Temporal matrix awaiting input
Converter Settings
All units are converted simultaneously as you type. Choose your entry unit below.
Calculation Base
Months are averaged at 30.44 days and years at 365.24 days to account for leap years and month variability.
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Conversions occur instantly in your browser. No data is logged or shared.
FAQs
How accurate are the month/year conversions?
We use standard scientific averages: a year is 365.2425 days (Gregorian mean) and a month is 1/12th of that year.
Can I convert negative durations?
Yes, the tool supports negative values for relative time calculations.