12 Best Calculator Plugins for Your WordPress Site

Offering interactive tools on your website is a great way to make it more engaging for your visitors and encourage them to stay longer. For example, on WPBeginner, we offer a wide range of free business tools, including a business name generator, a blog idea generator, and an SEO analyzer.

If you’re looking for a simple idea, then adding a custom calculator is one of the quickest and easiest ways to boost engagement. And there are many plugins that can help you set this up in just a few clicks.

Whether you run an eCommerce site, a business, or a blog, having the right calculator plugin can streamline processes, improve conversion rates, and add value to your site.

However, with so many options available on the market, choosing the right one can be overwhelming.

To make this easier for you, we’ve tested some of the most popular calculator plugins and examined factors such as ease of use, features, customization, and pricing. We personally like using WPForms, but we’ve also found some other great options we will share with you.

In this article, we will share our list of the best calculator plugins for your WordPress site.

Overview of the Best WordPress Calculator Plugins

#	Plugin	Best For	Pricing
🥇	WPForms Custom Calculators	Powerful and easy to add calculators	$49.50/year + Free
🥈	Formidable Forms Calculators	Advanced calculators	$39.50/year + Free
🥉	Calculated Fields Form	Adding mathematical calculations among form fields	Free
4	Responsive Mortgage Calculator	Mortgage calculations	Free
5	Measurement Price Calculator	Calculating pricing based on measurements	$12/month

How We Test And Review Calculator Plugins

There are a lot of different calculator plugins out there that you could use on your WordPress site. We were already using WPForms on all of our websites, so we were pleased to discover that it allows you to create all kinds of calculator forms.

Then, we downloaded the most popular plugins on our test site to check out all the features, pros, and cons. While doing that, we paid special attention to the following criteria:

• Features: We have added calculator plugins with all the features you will need, including premade templates, conditional logic, drag-and-drop functionality, a data input option, the ability to solve complex mathematical equations, and more.
• Design: We tested how easily we can adjust the calculator design to match different website themes, checking for responsiveness and flexibility in styling.
• Compatibility Check: We verified each plugin’s compatibility with other essential WordPress plugins, themes, and page builders to ensure it integrates smoothly without causing conflicts.
• Performance Evaluation: We monitored each tool’s impact on website speed and overall performance to ensure it would not negatively affect the user experience.
• User Reviews: We checked the plugin’s update history and community feedback to assess its reliability, ongoing support, and developer commitment to improvements.
• Reliability: We have only recommended plugins that we have tested ourselves. Additionally, we went through customer reviews and support as well.

Having said that, let’s take a look at the best WordPress calculator plugins for your website.

1. WPForms Custom Calculators

WPForms is the best drag-and-drop WordPress form builder on the market, and it allows you to easily create calculator forms for your WordPress website with its powerful Calculations addon.

We’ve used WPForms on several of our websites to add various forms, including contact forms, surveys, and user registration forms, and we’ve always had an excellent experience with it. You can learn more by reading our complete WPForms review.

WPForms offers a library of pre-made calculator form templates with built-in smart formulas, such as:

• Shipping Discount Calculator Template
• Mortgage Calculator Template
• Lease Calculator Template
• Car Insurance Quote Calculator Template
• Fuel Cost Calculator Template
• Sales Tax Calculator
• BMI Calculator Template
• Daily Calorie Intake Calculator Template

You can also create your own custom calculator from scratch inside the visual form builder. To build your formula, simply type in a calculation and use the dropdown menu to add your form fields as variables.

To make advanced calculations even easier, the plugin includes pre-built functions for averages, rounded numbers, random numbers, and time range length.

There’s even AI-Powered Form Building that you can use to create calculator forms in seconds. Simply type a description of the form you want, and the AI will generate it for you. If you need to make any changes, just keep chatting with the AI until the form exactly meets your needs.

In just a few clicks, you can easily embed your calculator form on any page, post, sidebar, or footer area in WordPress. Your website visitors can see their calculation results in real time.

You can also automatically send visitors their results in personalized email notification messages.

WPForms seamlessly integrates with popular email marketing services like Constant Contact, GetResponse, AWeber, and others. This allows you to automatically add leads to your email list.

WPForms is our top calculator pick due to its library of calculator templates and ease of use. It’s also one of the best WordPress contact form plugins.

Pros of WPForms

• During testing, we discovered WPForms’ other powerful features, including file uploads, geolocation data, surveys and polls, Stripe payments, form abandonment, coupons, conversational forms, and more.
• We love that it provides complete spam protection using its built-in functionality.
• Our research revealed that the plugin lets you completely customize your form’s colors and style.
• It comes with a conditional logic feature. You can use it to show users specific fields based on their previous choices.
• WPForms can integrate with SeedProd, allowing you to display forms on landing pages.

Cons of WPForms

• The plugin has a free plan, but the Calculations addon is only available in the WPForms Pro version.

Why do we recommend WPForms?

WPForms is the best calculator plugin for WordPress on the market. With its beginner-friendly form builder, 2000+ premade templates, and AI form builder, it is the ideal choice for adding calculators to your website.

Pricing: It starts at $49.50 per year. To add a calculator to WordPress, you’ll need to upgrade to the WPForms Pro plan, which costs $159.60 per year.

2. Formidable Forms Calculators

Formidable Forms is a drag-and-drop form builder with a large range of pre-built calculator templates. It stands out for us because we really like how easy it is to create complex calculators with Formidable Forms. The plugin is highly scalable and advanced, even for absolute beginners.

You can check out our findings in our detailed Formidable Forms review.

With Formidable Forms calculator templates, you can create and add the following calculators on your site:

• BMI Calculator
• Percentage Calculator Template
• Advanced Mortgage Calculator Template
• Simple Mortgage Calculator Template
• WooCommerce Product Configurator
• Car Payment Calculator Template
• Debt to Income Ratio Calculator Form Template
• Life Insurance Calculator Template
• ROI Calculator Form Template
• Savings and Investment Calculator Form Template
• Order/Billing Form Template
• Age Calculator Form Template
• Compound Interest Calculator Template
• Final Grade Calculator Template
• Pregnancy Due Date Calculator Form Template
• Daily Calorie Intake Calculator Template
• Length Conversion Calculator Form Template
• Paycheck Calculator Form Template
• Tip Calculator Form Template
• Amortization Calculator Template

Some of these are simple, useful tools, like the percentage calculator, the length conversion calculator, the tip calculator, and the age calculator. Others are much more detailed and offer huge value to your users.

For instance, if you’re running a medical or health blog, you might want to offer a BMI (Body Mass Index) calculator or a Daily Calorie Intake calculator. These are easy to create using Formidable Forms.

If you sell real estate, you could use the simple mortgage calculator or the advanced mortgage calculator on your site. You could even offer tools like the debt-to-income ratio calculator to help users determine whether the mortgage is affordable.

All Formidable Forms calculators are responsive and look great on mobile devices. You can also easily customize them to match your website’s branding.

Pros of Formidable Forms

• We love its multi-page forms feature, which allows you to break your calculator into multiple steps for a more user-friendly experience.
• It lets you use variables to build more advanced calculations, allowing for sophisticated results and estimates.
• During testing, we found that it enables users to use calculation results to trigger payments or invoices via PayPal or Stripe.
• Formidable Forms lets you create a searchable database.
• It allows users to save their progress and complete the form at a later time.

Cons of Formidable Forms

• It has a free plan. However, you will need the premium version to unlock calculators.

Why do we recommend Formidable Forms?

We recommend Formidable Forms for creating complex online forms with multiple arithmetic formulas, calculator pages, and more. It’s ultimately the best WordPress calculator plugin for solving complex problems easily.

Pricing: The basic plan costs $39.50 per year. Their most popular plan is Formidable Forms Business, which includes calculators and advanced form templates and costs $199.50 annually.

3. Calculated Fields Form

Calculated Fields Form is a free calculator plugin for WordPress that allows you to create online forms and perform mathematical calculations in form fields.

While testing this plugin, we liked its form and logic builder, which you can use to add fields, assign values to those fields, and define mathematical operators to run.

Calculated Fields Form comes with five built-in sample calculators that you can use or modify:

• Simple Calculator Operations
• Calculation with Dates (bookings with check-in and check-out dates)
• Ideal Weight Calculator
• Pregnancy Calculator
• Lease Calculator

You can easily use Calculated Fields Form with the WordPress content editor (block editor) and the old classic editor. It also works with popular page builder plugins, allowing you to add calculators to your landing pages and boost engagement.

Pros of Calculator Fields Form

• It comes with built-in built-in mathematical functions such as square root, powers, and more complex formulas.
• We appreciate that the plugin lets you add multiple calculation fields to your form.
• You can set validation criteria for form fields, ensuring correct input data before performing calculations.
• During testing, we found that the Calculate Fields Form generates PDF reports of form submissions, including calculation results.

Cons of Calculator Fields Form

• The plugin can slow down sites with many complex calculation fields, especially if there are multiple real-time calculations.

Why do we recommend Calculated Fields Form?

We recommend the Calculated Fields Form plugin because it is free to download and install on your site. Plus, if you want to add mathematical calculations in form fields, this is your go-to solution.

Pricing: Free

4. Responsive Mortgage Calculator

Responsive Mortgage Calculator is an easy-to-use mortgage calculator plugin for real estate websites. We particularly liked that it comes with a sidebar widget and shortcode that you can use inside your WordPress posts, pages, and below your listings.

The plugin lets you set up customizable loan terms, including loan amount, interest rate, and loan duration, to fit different mortgage scenarios.

It also has light and dark color schemes. However, you can disable plugin styling and use your theme’s colors or add custom CSS to style the calculator.

Pros of Responsive Mortgage Calculator

• It provides instant calculations as users input their data, delivering immediate results.
• During our investigation, we found that it displays a detailed amortization schedule that breaks down principal and interest for each payment period.
• It supports multiple currencies for international users, allowing you to tailor the calculator to different regions.
• We love that it shows total monthly payments, interest, and total loan cost, providing a clear and comprehensive summary for users.

Cons of Responsive Mortgage Calculator

• It doesn’t offer comprehensive support or documentation.
• Some users have reported compatibility issues with the tool.

Why do we recommend Responsive Mortgage Calculator?

We recommend Responsive Mortgage Calculator for its interactive mortgage calculator, which you can add to your pages, posts, and listings using a simple shortcode.

Pricing: Free

5. Measurement Price Calculator

Measurement Price Calculator is perfect if you are running a WooCommerce online store where you sell items of variable sizes. It allows you to add item pricing based on measurements selected by the customer.

Upon research, we discovered that it has two different measurement calculation methods, so you can choose whichever best suits your product. You can also offer unit pricing based on set quantities (such as a box of tiles).

Or you can let the user enter dimensions and buy the correct amount for the length, area, or volume they require. It works well with other top WooCommerce plugins and extensions.

Pros of Measurement Price Calculator

• We love that the plugins let you track inventory and shipping weight based on units.
• It allows you to create dynamic pricing tables for different product sizes or measurement ranges.
• In our real-time testing, we found that it updates pricing based on customer input.
• It supports calculations based on area, volume, perimeter, or weight.

Cons of Measurement Price Calculator

• The plugin doesn’t have a free version, and you will have to pay to get started with this plugin.

Why do we recommend Measurement Price Calculator?

We recommend the Measurement Price Calculator plugin for calculating your product pricing based on measurement. This plugin’s best feature is its support for calculations based on locality, making it super flexible.

Pricing: It costs $12 per month.

6. Product Options and Price Calculation Formulas For WooCommerce

Product Options and Price Calculation Formulas for WooCommerce provides additional WooCommerce product options and pricing calculation formulas for your online store.

We discovered that it comes with a custom product layout builder that lets you add and display more product options for each item.

It includes conditional logic and formulas to calculate pricing based on selection. You can use it to show, hide, or change product pricing based on the customer’s selection.

You can also use mathematical formulas to calculate product pricing and display options.

Pros of Product Options and Price Calculation Formulas

• You can create custom pricing formulas using any mathematical calculations based on customer selection.
• You can set minimum and maximum prices with custom messages if the calculated price exceeds the limits.
• We appreciate that the tool lets you create and use variables that aren’t directly tied to customer options. This allows you to calculate prices based on other factors, like dates or quantities.
• It lets you use custom prefixes, suffixes, and templates to display the price.

Cons of Product Options and Price Calculation Formulas

• Some users have reported compatibility issues with specific themes or other plugins.
• It might not be the best option for beginners.

Why do we recommend Product Options and Price Calculation Formulas?

We recommend the Product Options and Pricing Calculation Formulas plugin for WooCommerce stores that want to add conditional logic and built-in formulas to their product pages. The free version covers a lot of useful features, such as custom pricing formulas based on customer selections.

Pricing: Free

7. WooCommerce Price Based on Country

WooCommerce Price Based on Country is a free calculator plugin that does exactly what it says. The plugin uses WooCommerce’s geolocation feature to guess the customer’s location and displays pricing in the local currency.

We tested the plugin in real time and observed that it automatically calculates pricing by the current exchange rate. However, you can also manually set a rate for each currency.

It also includes a country switcher widget that enables users to change country and currency independently. This plugin works well with multilingual WordPress sites.

Pros of Price Based on Country for WooCommerce

• During testing, we found it compatible with WPML, making it a great choice for multilingual websites.
• It also supports shipping currency conversion for Flat Rate and International Flat Rate Shipping.
• The plugin allows bulk editing of variation pricing.
• Our research showed that it is compatible with other tools, such as WooCommerce Subscriptions.

Cons of Price Based on Country for WooCommerce

• It won’t work if the WooCommerce plugin isn’t activated on your site.
• The free version offers basic exchange rates. More advanced options are only available in the premium version.

Why do we recommend Price Based on Country for WooCommerce?

We recommend this plugin for displaying pricing on your site according to the visitor’s local currency. It automatically calculates pricing based on current exchange rates, and you can also add fixed rates for different currencies.

Pricing: Free

8. Mortgage Calculator

Mortgage Calculator is a useful and free real estate calculator plugin that lets your users estimate their mortgage payments.

It can add a simple calculator with the purchase price, down payment, and interest rate. Or, if you prefer, you can also include advanced options like property tax, homeowners insurance, and private mortgage insurance.

During our evaluation, we found that Mortgage Calculator also has a paid plan that lets you add an animated graph to help you visualize how your loan balance will decrease over time.

Pros of Mortgage Calculator

• It lets you display the calculator as a widget or embed it via shortcode.
• We liked that the tool is super beginner-friendly, with an easy-to-use interface.
• It has a bloat-free design for improved website performance.
• Mortgage Calculator is super mobile responsive.

Cons of Mortgage Calculator

• Some of the advanced features can only be unlocked in the pro plan.

Why do we recommend Mortgage Calculator?

We recommend Mortgage Calculator to add a simple real estate mortgage calculator on your site. It’s an ideal choice for real estate websites to offer engagement options to visitors, such as property tax calculation, down payment, interest rates, and more.

Pricing: Free

9. YITH WooCommerce Cost of Goods

YITH WooCcommerce Cost of Goods is a premium calculator plugin for WooCommerce stores. It helps you add the cost of items and then calculate profit margins in your WooCommerce reports.

We really love how it lets you include the product, shipping, and payment processing costs for each product. The plugin will then calculate and show your profit margin in WooCommerce reports as a separate column.

This allows you to instantly calculate how your business is doing and what you can do to make more sales. For instance, you can offer more discounts for certain products or increase prices for products where you are not making any profit.

Pros of YITH WooCommerce Cost of Goods

• You can use the bulk actions feature to set the same cost for multiple products quickly.
• We loved its sales and stock dashboards that monitor performance and stock levels.
• It easily integrates with other YITH plugins and supports multi-currency setups.

Cons of YITH WooCommerce Cost of Goods

• Some key features, such as detailed reporting and multi-currency support, are only available in the premium version.
• During our use, we found that initial configuration and syncing with existing products can be time-consuming, especially for larger stores.

Why do we recommend YITH WooCommerce Cost of Goods?

We recommend the YITH WooCommerce Cost of Goods plugin to calculate the profit margins for your WooCommerce products. The best part about this plugin is the flexibility to adjust prices based on your needs and profit margins.

Pricing: It costs $79.99 per year.

10. Loan Repayment Calculator and Application Form

Loan Repayment Calculator and Application Form is a great calculator plugin for finance sites. It can help you run and manage a financial business website and allows you to style the calculators according to your branding.

You can use it for fixed-fee payments, regular payments, savings, comparisons, and more. The calculator can handle different types of interest: fixed, simple, compound, and amortized.

The pro version also has sliders and the option for users to select their own currency.

Pros of Loan Repayment Calculator and Application Form

• The plugin lets you change the interest rate based on period and amount triggers.
• We liked that the tool is GDPR compliant.
• It is super lightweight and doesn’t slow down your site’s speed.

Cons of Loan Repayment Calculator and Application Form

• It has limited features compared to other tools on the list.
• We didn’t like that the plugin does not offer built-in reporting or analytics for interest calculations.

Why do we recommend Loan Repayment Calculator and Application Form?

We recommend the Loan Repayment Calculator and Application Form plugin for calculating loans on your financial website. It can handle different types of calculations for loan payments and also support different payment options, such as fixed payments, regular payments, savings, and more.

Pricing: Free

11. CI BMI Calculator

CI BMI Calculator is a simple body mass index (BMI) calculator plugin that is perfect for health and fitness websites, nutrition businesses, personal trainer blogs, and more.

The plugin allows users to enter their height and weight information to see their body mass index score. This indicates whether their weight falls into a healthy range or not.

When testing the tool, we really liked how this plugin lets you add the BMI calculator to your sidebar, page, or widget areas using a simple shortcode.

It is also available in both imperial and metric systems, so you can choose which unit will be used as the default option.

Pros of CI Bmi Calculator

• During our evaluation, we realized that calculators are responsive across all devices, including mobile, desktop, and tablet.
• It has a user-friendly interface.
• A simple shortcode lets you add a BMI calculator anywhere on your WordPress site.
• The plugin is translation-ready.

Cons of CI Bmi Calculator

• Some users have reported compatibility issues with the tool.
• It focuses only on BMI and does not support other fitness or health-related calculations.

Why do we recommend CI BMI Calculator?

We recommend the CI BMI Calculator plugin for its simplicity in adding a BMI calculator to your WordPress site. The BMI measurements are based on international standards and provide an accurate fitness report.

Pricing: Free

12. Stylish Cost Calculator

Stylish Cost Calculator is a great way to provide customized, instant quotes for potential customers and clients. To get started quickly, you can use one of the seven built-in calculator templates.

The calculator can automatically convert between currencies, detecting the user’s location to show the right one. Our investigation revealed that you can customize the cost calculator however you like, adding or removing options, changing colors, and more.

You can also set a bulk discount, create branded invoices, and more. If you have the Pro version of the Stylish Cost Calculator plugin, you can create coupons and integrate PayPal to collect payments online.

Pros of Stylish Cost Calculator

• It comes with dynamic form fields that change based on user input.
• We like that the plugin lets you create multi-step forms. They are ideal for breaking complex forms into manageable steps.
• It also comes with lead generation features like SMS notifications, PDF quote printing, and email-based follow-ups.
• You can create complex calculators with it.

Cons of Stylish Cost Calculator

• Some users have reported performance issues with the plugin upon adding complex calculators.
• Advanced features can only be unlocked in the pro plan.

Why do we recommend Stylish Cost Calculator?

We recommend Stylish Cost Calculator for generating quotes and estimates on your WooCommerce store. It’s flexible in styling the colors, adding/removing options, and more.

Pricing: Free

Which Is the Best Calculator Plugin For Your WordPress Site?

In our expert opinion, WPForms is the best calculator plugin for WordPress. It has a powerful Calculations addon and over 138 premade calculator templates. Plus, the plugin comes with a drag-and-drop AI form builder, conditional logic, and complete spam protection, making it a great choice for WordPress and WooCommerce sites.

If you just want to add a mortgage calculator to your real estate site, then we recommend the free Responsive Mortgage Calculator plugin.

On the other hand, you can use the Measurement Price Calculator if you have an online store and want to add item pricing based on size or quantity.

However, if you are looking for more complex calculations, then you should opt for Formidable Forms.

Basically, we added a calculator plugin for almost every business niche. This way, you know exactly which WordPress calculator plugin will work for your site.

Related Guides for Calculator Plugins

• Best Tax Calculator Plugins for WordPress (Expert Pick)
• How to Add a Shipping Calculator to Your WordPress Site
• How to Generate More Leads with Free Online Calculators (Pro Tip)
• Must Have WordPress Plugins for Business Websites
• How to Add a Currency Converter in WordPress
• How to Convert Metric Units to Imperial in WordPress

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