Skip to content
DevToolbox

Duration Calculator

Calendar-accurate duration down to the millisecond.


Start
End

Duration

Enter valid dates and times, including seconds and milliseconds (0–999).

Result

· →

Calendar breakdown

Years

Months

Days

Hours

Minutes

Seconds

Milliseconds

Years, months and days follow the calendar (leap years and month lengths). Hours and below are the exact leftover time.

ISO 8601

Exact milliseconds

Exact totals

Milliseconds
Seconds
Minutes
Hours
Days (24 h)
Weeks
Julian years (365.25 d)
Gregorian years (365.2425 d)

Keyboard shortcuts

  • NowN
  • Swap start and endS
  • Follow nowL
  • Open the command palette⌘K
  • Search tools/

Information

Category
Time
Runs
In your browser
Network requests
None

Processed locally in your browser.No requests are made with your input.