Time Calculator

How This Tool Works

This tool performs time calculations based on your inputs. Enter a start time and duration, or two times for a difference, then click a button.

Add Time Example:

Start Time: 09:00
Duration: 2 hours, 30 minutes
Result: 11:30
      

Subtract Time Example:

Start Time: 14:00
Duration: 1 hour, 45 minutes
Result: 12:15
      

Time Difference Example:

Start Time: 08:00
End Time: 10:30
Result: 2 hours, 30 minutes
      

Notes:

• Handles rollovers (e.g., 23:00 + 2 hours = 01:00).
• Minutes and seconds are capped at 0–59.
• Use "Copy Result" to copy the result to your clipboard.