Time Calculator can perform the following calculations: 1. calculate the time between two dates (e.g. 6 AM June 1st to 8:32 PM June 2nd) 2. add or subtract time to a time (e.g. 6 hours 5 minutes plus 11 hours 7 minutes) 3. add or subtract time to a date (e.g. 6 hours 5 minutes after 8:32 PM June 2nd) 4. convert a duration to different time scales (e.g. 5 years is 60 months, 3 weeks, 4 days) History of your calculations can be saved or deleted on an entry-by-entry basis.