# Calculate age from birthday (type: date)
**URL:** https://discuss.elastic.co/t/calculate-age-from-birthday-type-date/6633
**Category:** Elasticsearch
**Created:** [February 8, 2012, 8:41am UTC](https://discuss.elastic.co/t/calculate-age-from-birthday-type-date/6633 "2012-02-08T08:41:31Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@CBR](https://discuss.elastic.co/u/CBR)
#### Post date: [February 8, 2012, 8:41am UTC](https://discuss.elastic.co/t/calculate-age-from-birthday-type-date/6633/1 "2012-02-08T08:41:31Z")
Hello!
As I think it's stupid to store the age itself, I need to know if and
how it's possible to calculate the age from the stored birthday, to
filter searchresults by the calculated age.
[…]
"dob":{
"include\_in\_all":false,
"format":"dateOptionalTime",
"type":"date"
},
[…]
---
### Author:  [@avasilenko](https://discuss.elastic.co/u/avasilenko)
#### Post date: [February 8, 2012, 8:44am UTC](https://discuss.elastic.co/t/calculate-age-from-birthday-type-date/6633/2 "2012-02-08T08:44:59Z")
Hello,
Date is stored as unix timestamp with milliseconds precision (java-style).
Try to use it like long and calculate age accordingly.
Regards,
Alexandr Vasilenko
2012/2/8 c.bieser [christian.bieser@gmail.com](mailto:christian.bieser@gmail.com)
> Hello!
> As I think it's stupid to store the age itself, I need to know if and
> how it's possible to calculate the age from the stored birthday, to
> filter searchresults by the calculated age.
> […]
> "dob":{
> "include\_in\_all":false,
> "format":"dateOptionalTime",
> "type":"date"
> },
> […]
---
### Author:  [@CBR](https://discuss.elastic.co/u/CBR)
#### Post date: [February 8, 2012, 9:03am UTC](https://discuss.elastic.co/t/calculate-age-from-birthday-type-date/6633/3 "2012-02-08T09:03:28Z")
Hello Alexandr Vasilenko,
could you give me an Example?
I even don't know if I have to extend the mapping or if I have to
calculate it while querying or filtering.
Kind regards,
Christian Bieser
On 8 Feb., 09:44, Alex Vasilenko [aa.vasile...@gmail.com](mailto:aa.vasile...@gmail.com) wrote:
> Hello,
>
> Date is stored as unix timestamp with milliseconds precision (java-style).
> Try to use it like long and calculate age accordingly.
>
> Regards,
> Alexandr Vasilenko
---
### Author:  [@CBR](https://discuss.elastic.co/u/CBR)
#### Post date: [February 8, 2012, 11:56am UTC](https://discuss.elastic.co/t/calculate-age-from-birthday-type-date/6633/4 "2012-02-08T11:56:43Z")
Okay, I found out that it's not necessary to calculate the age to use
it with the range-filter as it's possible to use the date-values with
this filter.
---
### Author:  [@system](https://discuss.elastic.co/u/system)
#### Post date: [July 6, 2017, 3:40am UTC](https://discuss.elastic.co/t/calculate-age-from-birthday-type-date/6633/5 "2017-07-06T03:40:08Z")