Question 1

How to calculate time duration between two times?

Accepted Answer

Subtract the start time from the end time. Example: 9:00 AM to 5:00 PM = 8 hours. Our calculator handles AM/PM and 24-hour formats automatically.

Question 2

How to calculate overnight time duration?

Accepted Answer

For times that cross midnight, add 24 hours to the end time. Example: 10:00 PM to 2:00 AM = (2 + 24) - 22 = 4 hours.

Question 3

How to add or subtract time from a given time?

Accepted Answer

Add or subtract hours and minutes. Example: 9:00 AM + 3 hours 30 minutes = 12:30 PM. Our calculator supports both adding and subtracting time.

Question 4

What is the difference between 12-hour and 24-hour format?

Accepted Answer

12-hour format uses AM/PM (1-12). 24-hour format uses 0-23 (e.g., 2 PM = 14:00). Our calculator supports both formats.

Time Duration

About Time Duration Calculator