Duration
Duration = end date-time − start date-time
Because each field carries a full date, the result correctly spans midnight, multiple days, months or years — no manual carrying. We report it as days/hours/minutes and as total hours and total minutes for timesheets or billing.
Measuring time between two moments
Pick a start and end date-time and the calculator shows the exact gap between them — as days, hours and minutes, and as total hours and total minutes. Because each field carries a full date, spans that cross midnight or run across many days are handled correctly.
Handy for timing shifts, events, trips, or anything where you need a precise elapsed duration.