Time Converter

This free time converter converts durations between nanoseconds, microseconds, milliseconds, seconds, minutes, hours, days, weeks, fortnights, months, years, decades, centuries and millennia. Enter a value, pick the units, and the result updates live — with a swap button, adjustable precision (auto, or a fixed 0–10 decimal places), and one-click copy. Useful for scheduling, timeouts, rate limits and quick estimates.

Beyond a single from/to conversion, the tool shows a human-readable breakdown that splits any duration into years, days, hours, minutes, seconds and milliseconds (for example, 5000 seconds is 1 hour, 23 minutes, 20 seconds), plus a reference grid expressing your input in every supported unit at once. Months default to 30 days and years to 365 days, with average-length variants (30.44-day month, 365.25-day Julian year) also available so calendar estimates stay accurate. Invalid input is flagged with a clear message rather than failing silently.