Calculate elapsed time or add hours, minutes, and seconds across midnight.
Change the inputs that matter to your decision. Optional assumptions stay collapsed until you need them.
Elapsed time between the selected start and end.
Overnight spans are inferred when the end time is earlier than the start time.
Add an end date when the span crosses more than one day.
Practical notes about the inputs, assumptions, and result.
If the end time is earlier than the start time and no end date is supplied, the calculator treats the end as the next day.
Other tools in date & time.
Find the exact calendar and total-day difference between two dates.
Add or subtract years, months, weeks, days, or business days from a date.
Track up to two shifts per day, unpaid breaks, weekly totals, and overtime in a printable summary.