Add or subtract time
Add hours and minutes to a time, or take them away.
How to add hours to a time
Add the hours, then the minutes. If the minutes pass 60, carry one hour. If the hours pass 24 (or 12 on a 12-hour clock), you are into the next day. Example: 9:45 PM + 3 hours 30 minutes = 1:15 AM the next day.
Quick answers
Frequently asked questions
What time will it be in 8 hours?
Add 8 to the current hour. At 10:00 AM it will be 6:00 PM; at 6:00 PM it will be 2:00 AM the next day. The tool above starts from your current time.
What time was it 12 hours ago?
The same clock time with AM and PM swapped. At 3:00 PM, 12 hours ago was 3:00 AM.