Time Duration Calculator

Convert a duration to and from days, hours, minutes, and seconds, decimal hours, total milliseconds, and ISO 8601 duration format.

Frequently Asked Questions

What is the ISO 8601 format for 1 week?

P1W. Weeks are a separate component and cannot mix with days/hours/etc. in the same string. P1W2D is invalid; use P9D instead.

Does the tool normalize overflow?

Yes - 90 minutes becomes 1 hour 30 minutes; 26 hours becomes 1 day 2 hours. The normalized field shows the canonical form.

How long is 1,000,000 seconds?

11 days, 13 hours, 46 minutes, 40 seconds. Or P11DT13H46M40S in ISO 8601 form.

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Estimates for informational purposes only.

Important Disclaimer: Estimates for informational purposes only.

This calculator provides estimates for informational purposes only. Results are based on assumptions and may not reflect actual outcomes. Consult qualified professionals in relevant fields before making important decisions based on these results.

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