How to Perform Form Calculation Using a Widget

Last Update: March 6, 2017

Wondering how you can calculate a total based on the option selected by the user from your form? Calculation is now possible with Jotform. There are two ways on this, you can use Conditional Logic or you can use the Form Calculation widget. In this guide, we will discuss how we can use the widget to perform a calculation. 

Below are the steps to help you better:

JotForm Version 4:

1. Click on Form Elements.

2. Click on the Widgets tab, search for "Form Calculation" and add it to your form.

3. Now as an example, we will calculate the price of the product selected on a radio button multiplied to a quantity field. Here's how it looks like:

Note: If you want to assign a calculation value on a radio button, drop down or check box field, then you need to check this guide: How to Assign Calculation Value 

4. Click on the wand icon.

5. And then click on the  "Add Field" button, in order to add fields you want to be part of your formula.

6. Finally, once you are done with the formula, click on the Save button.

JotForm Version 3:

1. Search for the Form Calculation Widget under the "More Fields" section. To open the wizard, just click the wand icon.



2. Now as an example, I want to calculate the price of the product selected on a radio button multiplied to a quantity field. Here's how it looks like:


Note: If you want to assign a calculation value on a radio button, drop down or check box field, then you need to check this guide: How to Assign Calculation Value 

3. Now back to the form calculation widget wizard, you can see this window or display:

To fetch a field you want to add in your formula or calculation, just click the "Add Field" button.


4. A list of field names will appear, just click on the field you want to include to your calculation.


5. The mathematical operators are presented so you must click on each to add a formula between fields. You can also use your keyboard keys for + addition, - subtraction, / division and * multiplication. Below is a quick overview of the final setup.

You can also see other advance options like "Show empty decimal places", "Ignore Hidden fields" and other options by clicking on the more button:

Once there go to the options tab to get the widget  options mentioned above: 

If you want to perform advance mathematical operations, you can check this as a reference: Form Calculation - Math Function Reference 


6. You must click "Save" button to save the calculations and save button from the form builder to save the entire form changes. 

Here's an example form based on our steps above:  



The Form Calculation widget is not limited to the example I presented, it would depend on the requirement you need or how complex your formula is.

Questions? Please let us know below!


Eduard Bal (January 24, 2014 at 01:54 PM)

How can I get Always two numbers behind de decimal dot? I want for example have as solution of the sum 1.50 * 3 in a total box 4.50 or 1.50 * 2 = 3.00. I see in the total box just 4.5 or 3.
I hope you have a solution for me.

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pennistritter (January 31, 2014 at 05:29 PM)

I am not getting a total unless all fields have a value. What if one field is left blank? How do I get the total to show then?

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davidburt (February 03, 2014 at 11:18 AM)

I want to create a survey form which will have a final score based on the answers. Can you set a value for each question and then display the total?

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ParkingRetkinia (February 09, 2014 at 11:02 AM)

Is it posible to use logical content of calculation like:


If the answer is YES how to write it ?

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broytm (February 11, 2014 at 02:48 PM)

Is it possible to display the total word count in the form.. not just for the individual boxes?

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oranges (February 21, 2014 at 11:32 PM)

How do i associate a number value with a text option as was done in the example.

It appears that the radio buttons and drop down option have a number associated with them although they are text.

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supportadv (February 24, 2014 at 05:49 AM)

Hi, the "Calculate field" option is not happearing on radio button field in my form.
Is it a premium feature? Or is there some other reason?

from the guide:

"Note that the calculation function would only work with the following fields with Numeric entries/options:

1. Radio Button"

View Answer

MarkPutt (March 03, 2014 at 04:41 PM)

This doesn't work at all really. It only sees 4 fields that I absolutely don't need to calculate.

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afla21 (March 12, 2014 at 06:16 PM)

How do I get the calculator to ignore unwanted text content?
This is a new problem we just encountered today; the form was working just fine previously.
My form has a radio button that says
"Pre-registration $50". It's taking the hyphen as "negative," and adding -50 to the total field. Also I have drop down menus in the form of 1($12), 2($24), etc. It's taking the value to be $112, $224, etc., screwing up the calculation.
I guess I can change the format so that the relevant field contains just the values we want calculated, but I wonder if there is an alternative solution to this, since it did work before?

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demnos (May 01, 2014 at 09:34 PM)

Can I calculate the number of days between two dates (example: Today minus a date from my form)?

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Demond Spraberry (May 07, 2014 at 12:10 PM)

How can I calculate a form with 6 questions and each question has a different value using a check box?

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simonebrennan (May 27, 2014 at 01:39 AM)

Can an 'average' function be added?
I can't simply add the values and divide, since options are 1, 2, 3, 4, 5, N/A. Currently a score of N/A affects the calculation (taking it as zero), when I want it to be ignored.

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thescenedramaworks (August 10, 2014 at 02:49 PM)

How can I get the "other" field in the Radio Buttons options to be a numeric field?

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Joanna (October 08, 2014 at 05:46 PM)

I'm adding up fields in the form to calculate the total amount. The math works great but I would like to see a dollar sign in front of the result. $50, instead of 50. The calculation widget does not let me add any extra characters. Any ideas???

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seajj2 (March 26, 2015 at 08:37 AM)

I am trying to plug in this formula (quantity x 10 + 6). The formula works but in the calculation it automatically has the 6 in the total. I do not want it to show anything until they put in the quantity. How do I perform this?

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WOT (April 02, 2015 at 11:52 AM)

I cannot get this calculation tool to work.
1. The fields I need to add are text boxes labeled "Points max20" and so on. The fields I am offered in the calculation wizard are labeled something different.
2. I've inserted the fields, + sign as shown in the example, but the values are not calculating.

Am I missing something? Please help!

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escarecard (May 14, 2015 at 04:10 AM)

I'm trying to calculate a series of inputs with predefined inputs of 0-12. When calculating, the form seems to see 0 as 1, 1 as 2 even though the calculation values are set as 0-12.

Is the form calculation unable to recognise a zero value?


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Andre (May 16, 2015 at 08:05 PM)

é possivel calcular valores dos inputs dentro da Matriz criada?

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astankiewicz (June 11, 2015 at 09:08 AM)

So this functions is only for the form itself and can not be done on the dashboard at all - correct?

My purpose here is this: to make it so 5 viewers of the form results can rate the response from the form on the dashboard.

My Solution using these tools: Each Response is viewed and rated by each judge - the calculation field is recalculated each time and the form is submitted by each judge with each new calculation.

End result each response has a a calculated rating on the dashboard.

Will this work?


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cpachiasso (July 01, 2015 at 04:51 PM)

To me dropdown menu do not works for calculations

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strugar (August 27, 2015 at 03:04 PM)

Hi. Is there a plan to add function to calculate Poisson distribution? Similar to Excel function POISSON()? Thanks!

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AlanMnk (September 13, 2015 at 03:39 PM)

How does it work with dropdown menus???

How to attribute a number to dropdown options?

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Nic Crocker (December 09, 2015 at 04:16 PM)

I want to create a form which has 30 questions, each providing 3 potential responses phrased as a statement. I want to calculate how many answer As,answer Bs and answer Cs are selected. Is this possible?

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zappaaviaries (December 11, 2015 at 05:04 AM)

How do I use this for simple inventory tracking. I have an order form and it calculates the order total, but would like this...
I would like to have a beginning in stock number and as the products are ordered, have the available quantity reduced by that number.

How could I do that? Or can I do it even?

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buzz vaughn (January 07, 2016 at 09:47 AM)

how do i add $ and % to the answer calculated

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FransJanssen (February 19, 2016 at 02:43 AM)


Using a configurable list with dropdown, I would like a calculation for each row an user fills in.

The text in the configurable list is:
Broodje : dropdown : Zacht wit broodje, Zacht bruin broodje, Hard wit broodje (€ 0.30), Hard bruin broodje (€ 0.30), Croissant wit (€ 0.55), Croissant bruin (€ 0.55) : Maak uw keuze
Beleg : dropdown : Jong belegen kaas (€ 2.35), Oude Kaas (€ 2.65), Achterham (€ 2.65), Salami (€ 2.65), Ossenworst (€ 2.65), Filet Amercan (€ 2.65), Rosbief (€ 2.80), Roombrie (€ 2.80), Gezond (€ 2.80), Huzarensalade (€ 2.35), Eisalade (€ 2.78) : Maak uw keuze
Aantal : number : aantal

How to perform?

Sincerely, Frans.

View Answer

polishedcarz (March 11, 2016 at 07:43 PM)

I'm creating a Request a Quote for a Car Service.

Can I use the Driving Distance Calculator in order to calculate the results in mileage x $0.90/mile to equal a quote. Is this possible?

View Answer

agendia1 (April 02, 2016 at 09:23 PM)

Your forms service is superb. I just keep discovering every imagination and thought.

MGGKC (April 22, 2016 at 01:04 PM)

I would like to perform a conditional calculation. The result will then be added into a grand total using the calculation widget. How do I get the conditional calculation into a field that can be used later?

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hmcdowell (April 25, 2016 at 05:19 AM)

Hello, I am trying to add Calculation field and its not working out like it should. When I click on the check box of the item that I would like to calculate, it does not input the correct amount. For example if the amount is listed as $30, in the calculation field is says my total is 300000000000.00. Not sure how to current this. You should be able to view the form here,

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globalweb (July 03, 2016 at 10:28 PM)

How can I get the calculator widget to ignore certain part of a dropdown value?

For example here are the values we plan to have:
$49 - 10 Leads
$99 - 25 Leads

It needs to use the dollar value for calculation, but ignore the total lead #.

Thank you.

View Answer

elaren (October 05, 2016 at 12:53 AM)

I cannot for the life of me figure out how to calculate the days between 2 dates.
It would be awesome if someone could put the formula/calculation needed to do this.

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supremeprincesspageants (October 15, 2016 at 06:45 PM)

On the new version of the Calculation Widget how do you make the result field read-only?

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JPantoine (October 24, 2016 at 10:10 AM)

I am a new user. I do not find the "advances options" in the calculation widget. How couls I do? Thanks in advance.

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JCP_Art (January 24, 2017 at 02:20 PM)

Is it a way to add sales tax to a product?

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DefenderAmmo (January 24, 2017 at 08:02 PM)

It seems like the calculations work sometimes. I have a string of calculations that I'd like to go into the "total cost" box. It seems like some add together for the total cost and some values just replace whatever is in there. Can someone help?

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SFDAdmissions (February 28, 2017 at 12:02 PM)

I'm attempting to simply 1/2 a total if a preceding field is marked 'yes'.
Summer camp registration and we are giving a 50% to faculty members. I am using the form calculation wizard and have all the fields being added (field 1+field 2+field 3)*.5 is how I have it currently and it is simply returning the total with out the multiplier.

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tiablisstbc (March 23, 2017 at 05:56 AM)

I'm trying to do this equation and it won't give me a final total... help please!

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