# Duration of interview

**URL:** <https://forum.getodk.org/t/duration-of-interview/41453>\
**Category:** Support\
**Tags:** odk-xlsform\
**Created:** [May 7, 2023, 2:29pm UTC](https://forum.getodk.org/t/duration-of-interview/41453 "2023-05-07T14:29:23Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![danbjoseph](https://getodk.b-cdn.net/user_avatar/forum.getodk.org/danbjoseph/32/21901_2.png) [@danbjoseph](https://forum.getodk.org/u/danbjoseph)\
**Post date:** [May 7, 2023, 9:27pm UTC](https://forum.getodk.org/t/duration-of-interview/41453/2 "2023-05-07T21:27:34Z")

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Welcome to the ODK forum, @Mor_Gueye! We're glad you're here. When you get a chance, please [introduce yourself on this forum thread](https://forum.getodk.org/t/-/6671). Thanks for adding your profile picture. It helps build community! Questions about how to do something in the app should be posted to #support and not #community.

When calculating durations there are several options:

- You can use [metadata](https://xlsform.org/en/#metadata) to capture `start` and `end` and then calculate the total length in your data processing. Note that if the form is saved and the reopened for review before submission, this will change the `end` time.
- You can use [lightweight timestamping](https://docs.getodk.org/form-logic/#lightweight-timestamping).
- You can use a [form audit log](https://docs.getodk.org/form-audit-log/).

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