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About Time Converter Online
This tool converts between time units: milliseconds, seconds, minutes, hours, days, weeks, months, and years. Enter a value in any unit and all others update immediately.
Time conversions are useful in programming (converting API timeouts and rate limits from milliseconds to seconds), project management (converting person-days to hours or weeks), scheduling, and physics problems.
Month and year values use average durations (1 month = 30.4375 days, 1 year = 365.25 days) to handle calendar irregularities consistently. For exact calendar-based arithmetic, use a dedicated date calculator.
How to use this tool
How to convert time durations
Enter the duration
Type the duration in the Value field. Decimals like 1.5 (one and a half) are fine.
Pick the source unit
From offers s (seconds), min (minutes), h (hours), and d (days). All conversions assume an exact 24-hour day.
Pick the target unit
To lists the same units. To convert minutes to hours, leave From as min and switch To to h.
Press Run
Result is computed via seconds as the bridge with 12 significant digits. For calendar months or years use a date calculator instead — this tool does not handle calendar drift.