Tools

Time Duration Calculator for HH:MM:SS

Calculate duration between two times in hours, minutes, and seconds.

Time Duration Calculator

Calculate the duration between two times in a simple HH:MM:SS format. This is useful for time tracking, scheduling, and daily reports.

How to use the Time Duration Calculator

  1. Enter the start and end times.
  2. Click Calculate.
  3. Copy the duration result.

Common use cases

  • Tracking work shifts or sessions.
  • Calculating meeting lengths.
  • Estimating time between checkpoints.
  • Validating schedule blocks.

Tips & notes

  • Use 24-hour time to avoid ambiguity.
  • For date-aware durations, use date difference tools.
  • Overnight spans assume the next day.

Related time tools

  • Time Rounding Tool
  • Working Hours Duration Calculator
  • Countdown Timer Generator

FAQ

What if end time is earlier?
It assumes the end time is on the next day.
Does it include seconds?
Yes. It outputs HH:MM:SS.
Can I use 24-hour time?
Yes. Use 24-hour format for clarity.