Add Hours to a Time
Add Hours to Clock Time: Learn
How to add hours and half-hours to a time:
-
Add the minutes together. If the result is 60 or more,
- subtract 60 from the minutes
- add 1 to one of the hours
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Add the hours together. If the result is more than 12,
- Subtract 12 from the number of hours
- Switch AM to PM (or the reverse)
- Repeat until the hours are 12 or less
- If the final hours are exactly 12, switch AM to PM or PM to AM.
Example: What time is 17 hours and 30 minutes after 3:30 AM?
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Add the minutes: 30 + 30 = 60. Since this number is 60 or more,
- Subtract 60 from the minutes (60-60 = 0 minutes).
- Add 1 to the hours (17+1 = 18 hours)
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Add the hours: 18 + 3 = 21 hours. Since this number is more than 12,
- Subtract 12 from the hours (21-12 = 9 hours)
- Change AM (the original time) to PM.
- Final answer: 9:00 PM
Add Hours: Practice
What is the sum of the times?
00:00
hours past :00
0:00 AMPM
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