Duration in Seconds Calculator

Free duration to seconds converter. Convert hours, minutes, and seconds to total seconds. Essential for programming and calculations.

Convert any time duration into total seconds. Enter hours, minutes, and seconds and get the total second count instantly. Perfect for programming, video timing, or any calculation requiring seconds.

Common use cases

  • Programmers converting time for code
  • Video editors calculating frame times
  • Audio engineers measuring track lengths
  • Scientists recording experiment durations
  • Athletes comparing race times

How to use

  1. Enter hours (optional)
  2. Enter minutes (optional)
  3. Enter seconds
  4. View total seconds instantly
  5. Copy the result or use in calculations

FAQ

What's the maximum duration supported?

The calculator handles any practical duration—days, weeks, or longer—with no practical limit.

Can I enter decimals?

Yes, you can enter decimal values like 1.5 hours (which equals 5400 seconds).

How do I convert back to hh:mm:ss?

Use the seconds-to-hhmmss tool to convert seconds back to standard time format.