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Time Duration Calculator

Enter a start and end date-time and get the duration in days, hours, minutes, and seconds.

Enter a start and end date-time and get the duration in days, hours, minutes, and seconds.

Quick start: Pick the start date and time → Pick the end date and time → Read the duration broken down by unit

How to use Time Duration Calculator

  1. 1

    Pick the start date and time

  2. 2

    Pick the end date and time

  3. 3

    Read the duration broken down by unit

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Why use Time Duration Calculator?

  • Multi-unit breakdown (weeks, days, hours, minutes, seconds)
  • Handles second-level precision for timesheets
  • Works with overnight and multi-day ranges

Common use cases

  • Timesheet and billable-hours calculations
  • Event planning (elapsed time since launch)
  • Sleep or workout duration tracking

About Time Duration Calculator

The Time Duration Calculator answers one of the most common date-math questions: how much time is between two moments? Enter a start and end date-time and the tool reports the difference in six units at once — total seconds, minutes, hours, days, weeks, and a human-readable breakdown. It runs entirely in your browser and respects your local timezone, which is the right default for timesheets, event planning, and duration tracking.

Frequently asked questions

Durations are computed in wall-clock time using your browser's local timezone, so DST transitions shift the absolute difference by an hour as expected.
The duration is shown as a negative number, with a clear warning so you can swap the inputs if it was unintentional.

Your files never leave your device

Every tool on Xevon Tools runs 100% in your browser. No uploads, no servers, no tracking. Free forever.

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Embed Time Duration Calculator on your site

Add this tool to your own website, blog, or internal tool page with one line of code. Free to use, no attribution required (but appreciated).

<iframe src="https://www.xevontools.com/embed/time-duration-calculator" width="100%" height="640" style="border:1px solid #e2e8f0;border-radius:12px;" title="Time Duration Calculator — Xevon Tools"></iframe>
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