Adding Hours Calculator
Quickly compute future deadlines, shift end times, or travel arrivals by adding precise hours and minutes.
Supports decimals (e.g., 1.5 hours).
Enter negative minutes to subtract.
Start: Tuesday, November 25, 2025 at 11:49 AM
Resulting time: Tuesday, November 25, 2025 at 05:19 PM
Total added: 330 minutes (5.50 hours)
Difference from now: 329 minute(s) from now
How to Use This Calculator
Select a starting timestamp
Enter your shift start, departure, or project kickoff time.
Enter hours and minutes
Use decimals for hours or split them out between the hour and minute fields.
Record the target time
Copy the resulting timestamp into your scheduling or logging system.
Formula
Total Minutes = (Hours × 60) + Minutes
Target Timestamp = Start Timestamp + Total Minutes × 60 × 1000
Example: 2025-11-09 08:15 + 5 h 30 m → 2025-11-09 13:45 local time.
Where This Helps
- Calculate end-of-shift times or overtime cutoffs.
- Plan travel arrivals including layovers and delays.
- Schedule medication intervals or feeding times.
- Add lecture or meeting durations to your calendar quickly.
Frequently Asked Questions
Can I subtract hours?
Yes—enter negative values in the hours or minutes field to go backward in time.
What about seconds?
This version focuses on hours and minutes. For finer resolution, convert seconds to fractional minutes.
Does it account for DST?
Yes—calculations run in your local time zone and respect daylight saving transitions automatically.
Can I add more than 24 hours?
Absolutely. Large hour values will roll over to future days seamlessly.