# Calculation on Form Designer **URL:** \ **Category:** Users\ **Created:** [July 24, 2012, 11:45am UTC](https://forum.dimagi.com/t/calculation-on-form-designer/898 "2012-07-24T11:45:13Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Emeka\_Chukwu](https://dimagi.b-cdn.net/letter_avatar_proxy/v4/letter/e/ac91a4/32.png) [@Emeka\_Chukwu](https://forum.dimagi.com/u/Emeka_Chukwu)\ **Post date:** [July 24, 2012, 11:45am UTC](https://forum.dimagi.com/t/calculation-on-form-designer/898/1 "2012-07-24T11:45:13Z")
Hello All, I am new to Commcare, I have been trying for two days now to input a calculated field. I have read the Information on the site, and it says, to insert a data node and enter in the calculate field. I only see calculate condision. Even when enter in the calculate condision , it gives error on running. The equation is simple edd= date(/data/lmp+274). Please help -Emeka- ---
**Author:** ![Sheel\_Shah](https://dimagi.b-cdn.net/letter_avatar_proxy/v4/letter/s/779978/32.png) [@Sheel\_Shah](https://forum.dimagi.com/u/Sheel_Shah)\ **Post date:** [July 24, 2012, 12:08pm UTC](https://forum.dimagi.com/t/calculation-on-form-designer/898/2 "2012-07-24T12:08:43Z")
Hi Emeka, Is your data node called edd? If so, you don't need to specify "edd=". You can just specify a calculate condition of "date(/data/lmp+274)". The calculate condition will automatically be set for the question it was specified for. Thanks! Sheel > **ยทยทยท** > > On Tue, Jul 24, 2012 at 5:15 PM, Emeka Chukwu wrote: > > > Hello All, > > I am new to Commcare, I have been trying for two days now to input a > > calculated field. I have read the Information on the site, and it says, to > > insert a data node and enter in the calculate field. I only see calculate > > condision. Even when enter in the calculate condision , it gives error on > > running. The equation is simple edd= date(/data/lmp+274). Please help > > -Emeka- > > -- > Sheel Shah > Project Manager | Dimagi Software Innovations > t: +91 1146704670 | m: +91 9560187282