# How to Create a Custom Calculator in Elementor? Creating a **custom calculator** in Elementor is a great way to improve user engagement and provide instant value to your website visitors. Whether you want to build a **price calculator**, **loan calculator**, [**BMI calculator**](https://coolformkit.com/elementor-forms/bmi-calculator/), **mortgage calculator**, or **quotation form**, adding calculation functionality can help users get quick answers without leaving your website. However, **Elementor's native Form widget** does not include built-in calculation features. Traditionally, website owners had to rely on expensive third-party calculator plugins or custom JavaScript coding, making the process complicated to maintain. Fortunately, with **Cool FormKit's **[Calculator Field for Elementor Forms](https://coolformkit.com/features/calculator-for-elementor/), you can create powerful custom calculators directly inside Elementor without writing a single line of code. Using **simple formulas**, **advanced form fields**, and **conditional logic**, you can build interactive calculators for any industry or use case. In this guide, you'll learn how to create a **custom calculator** in Elementor step-by-step using **Cool FormKit** and turn your forms into powerful calculation tools. ## What is Cool FormKit for Elementor Forms? **Cool FormKit** is a powerful addon for the Elementor form addon that extends the functionality of the native Elementor form widget without replacing it. Instead of writing complex code, **[Cool FormKit](https://coolformkit.com/)** lets you create calculators in Elementor using simple field references and formulas. Easily use values from other form fields to perform basic or advanced calculations without any coding knowledge.  https://www.youtube.com/watch?v=HIoanm3GXEM Since the calculator works directly inside Elementor Forms, results are calculated in real-time as users enter their information, no page refresh required. Plus, you can fully customize the calculator's design using **Elementor's built-in styling options**. Now, let’s build a **Project Cost Calculator** from scratch using Cool FormKit to see how it works. ## Step-by-Step Guide to Build a Cost Calculator for Elementor Forms Follow the steps below to create a calculator using Cool FormKit: ### Step 1: Add a Form - Firstly, make sure you have installed and activated **Elementor** and **Cool FormKit**. - Open the page you want to edit with Elementor. - Drag the Form widget to your page. ### Step 2: Add Form Fields To calculate the total project cost, you'll first have to collect some basic information from the user (client). Add the following fields to your form: - Add a **Select** field to the form.Set the label to "**Select Your Website Package**". - Open the **Advanced** settings of the field and set the **Custom ID** to **type**. Add the following options: Standard Website (at $500) | 500 - E-commerce Store (at $1,500) | 1500 - Web Application (at $3,000) | 3000 - Mobile App (at $5,000) | 5000 - ***Note:** The number before the pipe (|) is the base price the calculator will use.* [![select_website_package](https://coolformkit.com/wp-content/uploads/2026/06/select_website_package.png)](https://coolformkit.com/wp-content/uploads/2026/06/select_website_package.png) - Next, add a **[Range Slider](https://coolformkit.com/features/range-slider-for-elementor-form/)** field. - Set the label to **"Number of Pages / Screens"**. Set the **Minimum Value** to **1**. - Set the **Maximum Value** to **50**. - In the **Advanced** settings, set the **Custom ID** to **pages**. [![range_slider_selection](https://coolformkit.com/wp-content/uploads/2026/06/range_slider_selection.png)](https://coolformkit.com/wp-content/uploads/2026/06/range_slider_selection.png) - Add a **Radio** field. Set the label to **"Select a Premium Addon"**. - From the **Advanced** settings, set the **Custom ID** to **feature**. - Add the following options: CMS Integration (+$300) | 300 - SEO Optimization (+$500) | 500 - User Authentication & Login (+$800) | 800 [![radio_button_selection](https://coolformkit.com/wp-content/uploads/2026/06/radio_button_selection.png)](https://coolformkit.com/wp-content/uploads/2026/06/radio_button_selection.png) ### Step 3: Add the Calculator Field & Formula - Now, add a **Calculator** field to the form. - Set the label to **"Estimated Build Cost"**. - In the **Formula** field, enter: `type + (pages * 100) + feature` This formula adds the project's base price, the page cost, and the selected premium feature cost to generate the final estimate. That’s it! Now, as the user changes the **dropdown**, slides the **page count**, or **toggles different features**, the **total price** will adjust instantly. [![](https://coolformkit.com/wp-content/uploads/2026/06/calculator_field.png)](https://coolformkit.com/wp-content/uploads/2026/06/calculator_field.png) [![](https://coolformkit.com/wp-content/uploads/2026/06/calculator_field_advanced.png)](https://coolformkit.com/wp-content/uploads/2026/06/calculator_field_advanced.png) ### Step 4: Formatting the Output Lastly, let's format the output of the calculator: - **Prefix:** Enter $ (or your local currency symbol). - **Decimals:** Select a decimal separator: either a period (.) or a comma (,) based on your requirement. - **Thousands Separator:** Choose a comma , to make large project totals easily readable. - **Suffix:** Add a suffix or unit after the calculated value, for example, “USD” or “per month.” ## Project Cost Calculator Demo Select Your Website Package: Standard Website (at $500) E-commerce Store (at $1,500) Web Application (at $3,000) Mobile App (at $5,000) Number of Pages / Screens: Select Addon Services: CMS Integration (+$300) SEO Optimization (+$500) User Authentication (+$500) Project Cost Send ## Conclusion Adding a custom calculator to your WordPress site used to take a lot of time. With **Cool FormKit**, you can build a beautiful, working calculator in just a few minutes.  But that is not all. Cool FormKit gives you much more than just a calculator. It comes with **[over 25 advanced features](https://coolformkit.com/features/)** packed into a single addon. Along with [Conditional Logic for Elementor Forms](https://coolformkit.com/features/conditional-logic-for-elementor-form/), [Country Code Dropdown](https://coolformkit.com/features/country-code-for-elementor-form/), [Rating Field](https://coolformkit.com/features/rating-field-for-elementor-form/) and more. #### Cool FormKit Addon Extend Elementor forms with advanced features like calculator field, conditional logic, and more. [Start Building →](https://coolformkit.com/) ![Elementor form extender](https://coolformkit.com/wp-content/uploads/2026/06/Elementor-form-extender.png)