Add or subtract time values in days, hours, minutes, and seconds. Calculate a future or past date/time, or evaluate time expressions like "1d 2h 3m + 4h 5s".
1d 2h + 4h 5s - 2030s.Add or subtract multiple time values (days, hours, minutes, seconds)
The Time Calculator provides three ways to work with time values. Unlike decimal arithmetic, time uses a sexagesimal (base-60) system for minutes and seconds, and a base-24 system for hours.
The Add / Subtract mode lets you combine multiple time durations in a grid format. The Date & Time mode calculates a future or past moment by adding or subtracting a duration from a specific starting date and time. The Expression mode evaluates free-form expressions using d, h, m, s units.
d — daysh — hoursm — minutess — seconds1d 2h 3m 4s + 4h 5s - 2030sFrequently Asked Questions