Time Calculator

This calculator can be used to "add" or "subtract" two time values. Input fields can be left blank, which will be taken as 0 by default.

Use this calculator to add or subtract time (days, hours, minutes, seconds) from a starting time and date. The result will be the new time and date based on the subtracted or added period of time.

Use this calculator to add or subtract two or more time values in the form of an expression. An acceptable input has d, h, m, and s following each value, where d means days, h means hours, m means minutes, and s means seconds. The only acceptable operators are + and -. "1d 2h 3m 4s + 4h 5s - 2030s" is an example of a valid expression.