Time Addition Calculator
Add hours and minutes to a clock time and see the resulting time, including calculations that cross midnight.
What the calculator does
Start with a clock time, then add the entered hours and minutes. The result wraps naturally through noon, midnight, and the next clock cycle.
result time = starting clock time + duration
Worked example
11:30 PM plus 1 hr becomes 12:30 AM. Another example: 9:20 AM plus 2 hr 45 min becomes 12:05 PM.
Normalize minutes when adding by hand
If the minute sum reaches 60 or more, carry each complete 60 minutes into the hour column. For example, 20 + 45 = 65 minutes, which is 1 hour 5 minutes.