Time Duration Calculator
Find the hours and minutes between two times of day.
Last updated
—Duration
—Decimal hours
—Total minutes
About this tool
If the end time is earlier than the start time, check "End time is the next day" to have it treated as crossing midnight (e.g. 22:00 to 06:00 becomes an 8-hour overnight span) — without it, an end time earlier than the start is flagged as invalid rather than silently guessed at.
Nothing entered here is sent to a server — the entire calculation runs as JavaScript in your browser tab.