TIME / CLOCK
Time Calculator
Find the duration between two times, handle an overnight range, and shift the start time by minutes.
Set time inputs
Use the 24-hour clock fields and a non-negative minute adjustment.
Time result
Your time result will appear here
Enter two times and a minute adjustment, then calculate.
One form for duration and time shifts
The calculator reports the time between the two clock values and separately adds or subtracts minutes from the start time. Cross-midnight mode adds one day only when the end clock time is earlier.
Overnight example
For 23:30 to 01:15 with Cross midnight enabled, the duration is 1 hour 45 minutes.
Clock wrap
Adjusted times wrap through 00:00, so adding minutes to 23:30 can correctly return a time on the next clock day.
Frequently Asked Questions
How do I handle a time range that crosses midnight?
Set Cross midnight to Yes. If the end clock time is earlier than the start clock time, the calculator adds one day to the duration.
Can I add and subtract minutes?
Yes. Choose Add minutes or Subtract minutes and enter the adjustment amount.
What format is the adjusted time?
The adjusted time is shown as a 24-hour HH:MM clock value and wraps around midnight when needed.
Does this calculate a date as well?
No. It calculates clock times and durations. Use the Date Calculator for calendar dates.
Does it store my times?
No. The core calculation runs in your browser and does not require an account.