Hours Calculator

How to Add or Subtract Hours and Minutes

This calculator takes a starting time and adds or subtracts a duration to find the resulting time.

Step-by-step

1. Enter the starting time using the time picker.
2. Enter hours and minutes to add (for time shifts forward).
3. Enter hours and minutes to subtract (for time shifts backward).
4. The calculator shows the resulting time, handling AM/PM automatically.

Worked example

Start at 2:30 PM, add 2 hours 45 minutes. Result: 5:15 PM. Or start at 9:00 AM, subtract 3 hours. Result: 6:00 AM.

When to use

Calculating shift end times, medication scheduling, flight arrival times across time zones, cooking timers, and planning multi-step schedules.