Universal Time Converter

Convert across many related units. Enter your value and which unit it uses.

Two of these columns are deliberate fictions and you should treat them as such. The month is hard-coded at 2,592,000 seconds, a flat thirty days, which matches April, June, September and November and no other month in the calendar. The year is 31,536,000 seconds, a flat 365 days, so it runs about a quarter of a day short of the tropical year and drifts by roughly one full day every four years. Both are fine for rough project arithmetic — a six-month warranty, a rate quoted per year — and wrong for anything that has to land on a date. The honest columns are the ones with fixed definitions: seconds, milliseconds and microseconds, and the minute, hour, day and week at 60, 3600, 86,400 and 604,800 seconds. At the far end sits Planck time, 5.391247e-44 seconds, included as a physical curiosity; even a single microsecond expressed in it produces a number with thirty-odd digits. Nothing here knows about calendars. There are no leap years, no leap seconds, no daylight-saving transitions and no time zones, so this converts durations, never instants — for a wall-clock answer you need a date-aware tool, not a factor table.