Question 1

How do I add or subtract time?

Accepted Answer

Enter two time values in hours, minutes, and seconds format, then choose whether to add or subtract them. The calculator handles overflow automatically (e.g., 90 minutes becomes 1 hour 30 minutes).

Question 2

Can I calculate the difference between two dates?

Accepted Answer

Yes! Use the Date Difference tab to enter two dates and get the exact difference in years, months, days, hours, minutes, and seconds.

Question 3

How does timezone conversion work?

Accepted Answer

Enter a time and select source and target timezones. The calculator converts the time accounting for daylight saving time and timezone offsets automatically.

Question 4

What if my duration spans overnight?

Accepted Answer

The Duration Calculator automatically handles overnight periods. If the end time is earlier than start time, it assumes the end time is the next day.

Advanced Time Calculator

Time Arithmetic

Frequently Asked Questions

How do I add or subtract time?

Can I calculate the difference between two dates?

How does timezone conversion work?

What if my duration spans overnight?