Duration calculator

Add durations and export the total in ISO 8601 form.

Runs on your deviceWorks offline after setupAll Utilities

Related tools
Enter your values, then choose Calculate.
Limits
  • Use d, h, m and s, or H:MM[:SS]. Millisecond precision; total up to 10,000 days. Approximate real-number outputs use 12 significant digits unless a unit specifies otherwise.
  • Desktop limits are provisional. Physical mobile and Safari verification remains open.