Title: Problem with calculation
Last modified: October 9, 2016

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# Problem with calculation

 *  Resolved [Marvin0341](https://wordpress.org/support/users/marvin0341/)
 * (@marvin0341)
 * [9 years, 8 months ago](https://wordpress.org/support/topic/problem-with-calculation/)
 * Hello!
 * I am trying to build a calorie-calculator (Harris & Benedict formula) for my 
   website using Ninja Forms. For this formula I use the ‘complex’ equation and 
   everything seems to work. When I fill in the values (weight, height, age + activity)
   the form gives the correct outcome based on the formula below:
 * (88.362 * 1) + (13.397 * field_53) + (4.799 * field_54) – (5.677 * field_55)
 * = this is how the exact equation looks in my ninja form settings.
 * However, when I open the complete form on my website it already shows 88 in the
   area in which the outcome is shown. When I use the calculator the correct answer
   is shown, but when nothing is filled in, it shows 88 as ‘starting value’. I know
   why it shows 88, this is de first given value in the equation (this factor does
   not depend on any variable input). How can I make sure the 88 is NOT shown as
   a standard outcome value. I want this to be empty and only show a number / value
   when someone fills in the form.
 * I hope someone can help me 🙂
 * Thanks in advance!
 * Best regards,
 * Marvin Grouw

The topic ‘Problem with calculation’ is closed to new replies.

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## Tags

 * [calculation](https://wordpress.org/support/topic-tag/calculation/)

 * 0 replies
 * 1 participant
 * Last reply from: [Marvin0341](https://wordpress.org/support/users/marvin0341/)
 * Last activity: [9 years, 8 months ago](https://wordpress.org/support/topic/problem-with-calculation/)
 * Status: resolved