Date and Time Calculator

Difference between dates and times and adding or subtracting duration. Fast and simple.

Difference between two dates/times

Days
Hours
Minutes
Seconds

Add/Subtract duration

Benefits of UtiliApp

  • ✓100% free
  • ✓Works in the browser
  • ✓Not registered
  • ✓Deleted files

How to use

  1. 1.

    Calculate difference

    Enter start and end; automatically display days/hours/min/sec.

  2. 2.

    Add or subtract

    Set the base date and duration; choose Add or Subtract.

  3. 3.

    Copy

    Select the result to copy when you need it.

Frequently Asked Questions

Does it work offline?

The calculation runs in the browser, without sending data.

Time zones?

Use your device's time zone. For UTC, adjust the time manually.

Your files are processed locally and deleted.

Converting dates and times is common in planning, deadlines and reports. This calculator helps to measure intervals and to project future dates from a duration.

Precision

The calculations consider minutes and seconds. For months/years, use approximate days as needed.

See also