**akmaleddy****Ian**Here is the demo : https://form.jotform.com/61880675038968

Feel free to clone this form so you can figure out the whole setup.

Guide: https://www.jotform.com/help/28-Cloning-a-Form-from-a-Web-Page

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Basically, what you need 2 datetime fields and 2 form calculation fields.

Here are the screenshots:

*Make sure to enable the default date on the 2 datetime fields.*You need to define the formula on each of the calculation field.

The first calculation field (Days) gets the number of days, here's the formula:

On the second calculation field (Age), this will calculate the Age base from the given birth date of the user using math Floor function.

If you need further assistance, do let us know.

**akmaleddy**can you give me the formula?

2017-01-17 21:23 GMT+07:00 JotForm :

...- JotForm Support
**BDAVID**The formulas are listed in the step by step example my colleague has provided.

You can clone his form if you want to: https://www.jotform.com/help/42-How-to-Clone-an-Existing-Form-from-a-URL

URL to the form: https://form.jotform.com/61880675038968

Let us know if you need more help.

**akmaleddy**thank u for your help