Time rounding calculator
Round a clock time up, down or to the nearest selected interval, showing date rollover.
Preparing your tool…
How it works
Round minutes since midnight; exact halfway values round upwards.
Example
23:58 rounded to the nearest 15 minutes is 00:00 on the next day.
What should I check before using the result?
A personal rounding helper, not an employer or statutory timekeeping policy.