Add Hours to Time
Calculate what time it will be after adding hours and minutes to any time.
Add or Subtract Time
How to Add Hours to Time
1
Enter Base Time
Enter your starting time, or click "Use Current Time" to start from now.
2
Enter Duration
Enter the hours and minutes you want to add or subtract.
3
Get Result
Click Calculate to see the resulting time and date.
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Frequently Asked Questions
Enter your starting time in the "Starting Time" field, enter the hours and minutes you want to add, make sure "Add time" is selected, then click Calculate. The result will show the new time.
Yes! Change the "Operation" dropdown to "Subtract time" and the calculator will subtract the hours and minutes from your starting time instead of adding them.
The calculator automatically handles date changes. If adding hours pushes the time past midnight, the result will show the new time along with the correct date.
Yes! Set the hours to 0 and enter only the minutes you want to add. You can also add both hours and minutes together in a single calculation.
How to Add Hours to Time
Adding hours to a time is a common calculation for scheduling, planning, and everyday life. Whether you're figuring out when a flight lands, calculating cooking times, or determining when a medication is due, this calculator makes it easy.
The Math Behind Adding Hours
When adding hours to a time, you need to account for:
- Hour rollover (12:00 PM + 2 hours = 2:00 PM)
- AM/PM changes (11:00 AM + 2 hours = 1:00 PM)
- Date changes (11:00 PM + 3 hours = 2:00 AM the next day)
- Minutes over 60 converting to hours
Common Uses
- Flight arrival times: Departure time + flight duration
- Cooking timers: Start time + cooking duration
- Meeting scheduling: Finding available times
- Time zone conversion: Adding or subtracting UTC offset
- Medication schedules: Next dose time
Quick Examples
- 9:00 AM + 3 hours = 12:00 PM
- 2:30 PM + 4 hours 30 minutes = 7:00 PM
- 10:00 PM + 5 hours = 3:00 AM (next day)
- 12:00 PM - 3 hours = 9:00 AM