Time Duration Calculator

Calculate the exact difference between two times

Calculate the exact duration between two times. Perfect for work hours, study sessions, meeting planning, and event scheduling.

How to use this tool
  • Enter Start Time (hours and minutes)
  • Enter End Time (hours and minutes)
  • Check "End time is on the next day" for overnight shifts
  • Click Calculate Duration to see the time difference
Privacy & Security

All calculations are performed locally in your browser. No data is ever sent to any server.

Time Duration Formula
  • Duration = End Time − Start Time
  • If "Next day" checked: add 24 hours to end time
  • Ideal for work shifts, study sessions, or event planning
How is time duration calculated?

The difference is computed in minutes, then converted to hours and minutes. If "next day" is checked, 24 hours are added to the end time.

Can I calculate overnight shifts?

Yes, simply check the "Next day" box when the end time is past midnight.

Does this tool support seconds?

The time inputs support hours and minutes. For precise seconds, you may use an advanced calculator.

Is this tool free?

Yes – completely free with no registration, limits, or watermarks.