Updated on 2025-09-15 · Free · en/fr
Add, subtract, multiply and divide time values, add/subtract time to a date, or sum up to 20 durations. Free, fast, accurate.
Add or Subtract Two Time Values
Leave fields blank = treated as 0.
Add or Subtract Time from a Date
Enter a start date/time, then add or subtract days, hours, minutes, seconds.
Add Time (up to 20 rows)
New rows will appear as you fill them.
= 0 h 0 min 0 sec