Time Duration Calculator

Durations spanning midnight or multiple days need date and time together — timestamps, essentially. This calculator subtracts full timestamps and re-expresses the result as days, hours, and minutes, which is how flight times and shift logs are computed.

Two timestamps in different zones can't be subtracted directly — a 6-hour flight leaving at 3 pm and landing at 5 pm crossed four zones. Convert both ends to one zone (UTC is the neutral choice) before doing duration math.