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Date & TimeFormula-based · Runs in your browser

Time Duration Calculator

Calculate elapsed time between two clock times, including an optional next day.

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Inputs

Enter the values you know. Optional fields may be left empty.

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Required
Required

Result

Updates as valid inputs change.

Calculated locally
Duration
—
Total minutes
—
Decimal hours
—
Total seconds
—

Saved locally, explained clearly

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Calculation steps

Follow what happened from the selected formula to the displayed answer.

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  1. 1

    Formula selected

    The calculator uses the following formula or method.

    Duration = end clock time − start clock time (+ 24 hours when next day is selected)

  2. 2

    Values entered

    Your values are placed into the calculation.

    Enter values to see what is used in this step.

  3. 3

    Result calculated

    The formula or method produces the following result values.

    Results will appear after a successful calculation.

  4. 4

    Answer formatted

    Displayed values are rounded and formatted using each output’s configured precision.

Scenario comparison

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Recent calculations

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Data and privacy

How it works

Clock times are converted to seconds. Select next day for an overnight interval.

Input query strings and outputs

Use an input name in this page’s URL as ?name=value, and join additional inputs with &. Portable shared links may instead use the compact ?ac= state parameter.

Input query strings

3
  • ?startTime= Start time

    Time · Required · Default: 09:00

  • ?endTime= End time

    Time · Required · Default: 17:30

  • ?nextDay= End time is on the next day

    True or false · Optional · Default: false

Outputs

4
  • duration Duration

    Text · Primary output

  • totalMinutes Total minutes

    Number

  • decimalHours Decimal hours

    Number

  • totalSeconds Total seconds

    Whole number

Seconds

The browser time input can include seconds when supported.

Sources
  • No external reference is listed for this calculator. Its formula and variable definitions are shown above.
Limitations
  • Calendar results depend on the selected dates and time-zone assumptions. Local holidays and daylight-saving changes are included only where stated.

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