With the 123FormBuilder online form builder you can perform calculations on your web forms & surveys. Use form calculations to add mathematical operations between your fields on your online forms.
First, you need to assign the values to your products/services. To do so, please add a choice field (single/multiple choice or dropdown field). Click on the field to open its options and select Value/Price. Type the price under the Values column.
By default, a field has no value assigned to it, meaning the input will be multiplied with zero. If you need the user to type the amount, add a number field and assign the value “1”. The form will calculate input value X 1. ( e.g user types 123, the number field will calculate 123 X 1= 123 instead of 123 X 0= 0).
When you are using an input field, it works as a quantity field. Assign the full price to the field (e.g $150). If the user types 2, the calculation will be 2 X 150 = 300$.
To create mathematical operations on your form, add a Formula field. This field will show the total value in real-time.
Click your formula field. A calculator will appear where you can add operations between your form fields. Use the Add field button within the calculator to add your form fields. Once the field is selected, it will be automatically added in the formula. You can use your keyboard to add operators and values.
You can also add calculations between the Time and Date fields. The operation between two Time fields, for example, will return the value in number of minutes, while the one between Date fields will return the value in number of days.