Add or subtract hours and minutes, calculate duration between times, or convert time zones.
9:00 AM to 5:00 PM = 8 hours
9:00 AM to 1:00 PM = 4 hours
12:00 PM to 1:00 PM = 1 hour
10:00 PM to 6:00 AM = 8 hours
Select Add/Subtract to modify a time, or Duration to find time between two points.
Input your starting time and the hours/minutes you want to add, subtract, or compare.
See the calculated result immediately. Works with times that cross midnight.
Calculate total hours worked, overtime, or break durations.
Add flight duration to departure time to find arrival time.
Calculate when food will be ready based on cooking time.
Figure out end times for meetings, appointments, or events.
Enter your starting time in the input field, make sure "Add" is selected, then enter the number of hours and minutes you want to add. The result will update automatically. For example, adding 3 hours to 10:00 AM gives you 1:00 PM.
Switch to "Duration Calculator" mode, enter your start time and end time, and the calculator will show you the total hours and minutes between them. It automatically handles times that cross midnight (e.g., 10 PM to 6 AM = 8 hours).
Yes! The time calculator handles times that cross midnight automatically. If you add 10 hours to 8:00 PM, it will correctly show 6:00 AM. The duration calculator also works across midnight— 10:00 PM to 2:00 AM correctly calculates as 4 hours.
Click the "Subtract" button in the Add/Subtract mode, then enter the hours and minutes you want to subtract. For example, subtracting 2 hours from 10:00 AM gives you 8:00 AM. Subtracting past midnight wraps to the previous day (e.g., 1:00 AM minus 3 hours = 10:00 PM).