Seconds Calculator: See Seconds Between Two Times

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Below is a seconds calculator. Using the inputs, enter two wall clock times with the number of seconds (up to 24-hours apart). The tool will compute how many seconds separate the two. 

Seconds Calculator Between Two Times

Using the Seconds Calculator

To use the tool to find the seconds difference between two times, enter

  • Start time: Enter when the activity began
  • End time: Enter the time when the tool should end the calculation

Click the blue 'Calculate Difference in Seconds' button to start the calculation. The tool will let you know how many seconds separate the two, up to a maximum of 24 hours.

  • Seconds Between: A count of the seconds between the start and end time you entered in the tool.

By default, the tool has an 8:30 AM - 5:30 PM workday if you are curious how many seconds make up that time.

Seconds difference calculator run for a standard work shift
Example seconds difference calculation for a standard shift

Can I cross midnight (enter a start time later than end time)?

Yes, the tool has no problem crossing midnight. You can enter a time that looks like the beginning is after the start; the tool doesn't mind the direction to do the seconds calculation.

Is Midnight AM or PM? Is Noon AM or PM? 

By tradition, 12:00 PM is noon, and 12:00 AM is midnight.

Seconds Between Two Times

Hopefully, this tool helped calculate how many seconds are between two times if you were curious. While you don't always need to know the seconds gap between times, it can be fun to see how many times the clock will tick before the end!

Try other date and age calculators:



PK started DQYDJ in 2009 to research and discuss finance and investing and help answer financial questions. He's expanded DQYDJ to build visualizations, calculators, and interactive tools.

PK lives in New Hampshire with his wife, kids, and dog.

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