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    Date & Time

    Time calculator

    Combine task durations, recording lengths or travel segments without wrapping at midnight. Enter two durations to add them or subtract the second from the first. The result includes an hours:minutes:seconds duration plus decimal hours and total seconds.

    MAKE IT SIMPLE

    Use hours:minutes or hours:minutes:seconds, for example 25:30 or 2:05:09. These are durations, not clock times.

    Result

    Worked examples

    2:30:00 + 1:45:30

    04:15:30

    Thirty minutes plus forty-five minutes carries one hour, with thirty seconds remaining.

    1:00 − 2:30

    -01:30:00

    The second duration exceeds the first by ninety minutes.

    Questions & answers

    Can I enter 1.5 for one and a half hours?

    Use 1:30. The input accepts colon-separated whole hours, minutes and optional seconds; decimal hours are shown in the output.

    Can I calculate arrival time?

    This tool adds and subtracts durations only. It does not attach a start date or clock time to the result.

    Related tools

    Date & Time

    Date difference calculator

    Count calendar days between two dates, include both endpoints if needed, and see complete weeks plus remaining days without daylight-saving errors.

    Ready to use