The Best WordPress Calculator Plugin

Easily Create Interactive Calculators with the Top Drag and Drop Form Builder

  • Create custom calculators in minutes
  • Generate more leads and higher revenue
  • Display calculators anywhere on your site
  • Get dozens of calculator templates

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The Feature-Packed WordPress Calculator Plugin You Can Trust

Formidable Forms is the WordPress calculator plugin you can depend on. Transform your site into a lead generation machine with our user-friendly calculator builder.

Calculated Form Fields

Easily create forms that automatically calculate anything you want.

Drag and Drop Calculator Builder

Add calculators to WordPress with our easy drag and drop form plugin.

Advanced Math Calculations

Perform calculations inside forms or dynamically anywhere on your site.

Visual Calculator Styler

Ensure your calculators match your site with our intuitive visual styler.

eCommerce Price Calculators

Prevent multiple submissions from the same users, and limit the total number of responses.

Display Calculated Data with Views

Only ask the questions that matter with smart conditional logic.

Mobile-Friendly, Responsive Calculators

Input item pricing and create eCommerce solutions with ease.

Calculator Templates for Instant Forms

Use online calculator templates to get started in just a few clicks.

Create Powerful Calculators for Any Industry

Easily build business calculators for finance, insurance, real estate, software, fitness, and much more. The best part? Our calculator templates are ready to do the hard work for you. Get started with the most flexible calculator plugin for WordPress.

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Stylized image depicting how Formidable Forms can be used to create a calorie calculator, part of the WordPress calculator plugin.

Popular WordPress Calculator Plugin Examples

Advanced Mortgage Calculator

Get an advanced, in-depth financial analysis on a new mortgage.

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BMI Calculator Form

Calculate BMI (body mass index) to help clients improve health & fitness.

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Percentage Calculator

Find a specified percentage of an entered number.

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Simple Mortgage Calculator

Optimize any real estate website with this responsive mortgage calculator!

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WooCommerce Product Configurator

Calculate the total value of a WooCommerce product with add-ons and style options.

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Net Promoter Score (NPS) Survey Form

Collect valuable feedback to increase customer satisfaction.

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Car Payment Calculator

Calculate monthly payments with an easy auto loan calculator.

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Sample Size Calculator

Find out how many people need to respond to a survey to produce statistically significant results.

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Age Calculator Form

Get an age calculator that tells you your age down to the day!

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Compound Interest Calculator

Calculate total compound interest on an investment or loan.

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Final Grade Calculator

Calculate the grade needed on an exam to get the desired final score.

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Pregnancy Due Date Calculator Form

Calculate the number of days until the baby due date.

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Daily Calorie Intake Calculator

Calculate the daily calorie intake required to reach fitness goals.

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Length Conversion Calculator Form

Convert lengths across different units of measurement.

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Paycheck Calculator Form

Find your salary, daily, weekly and monthly wages based on hourly rates.

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Tip Calculator Form

Calculate a tip whether splitting the bill or paying alone.

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Amortization Calculator

Estimate monthly mortgage payment principal and interest amounts.

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Debt to Income Ratio Calculator Form

Check for a healthy debt to income ratio before starting a loan.

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Life Insurance Calculator

Offer accurate life insurance estimates with this calculator.

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ROI Calculator Form

Estimate the profit or loss on an investment as a simple percentage.

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Savings and Investment Calculator Form

Estimate profit from an investment or savings account.

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Time Sheet

An effective way of keeping track of employee hours each week.

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T-Shirt Order Form

Let customers select and order multiple t-shirts in the colors and sizes the want.

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Order/Billing Form

A simple order form to start collecting payments fast.

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Deadline Calculator

Calculate deadlines in seconds. Add or subtract days from a date to calculate a new date.

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Pay Raise Percent Calculator

Enter a wage before and after a raise to find out how big it is.

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Volume Calculator

Input the dimensions of your object into the calculator to easily determine its volume.

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Shipping Date Calculator

Calculate the estimated delivery date for a package using transit time and processing time.

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Fuel Cost Calculator

When going on a trip it is nice to know how much fuel will cost. This calculator is very helpful in budgeting for a road trip.

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Gas Buddy Trip Calculator Form

When going on a trip with a buddy, it is nice to know how high the cost will be when splitting it between multiple people.

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Vacation Request Form

Let employees request time off online with this vacation request form template.

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Conversion Rate Calculator

Find out the percentage of people are making purchases with this quick and easy lead magnet conversion rate calculator.

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Credit Card Repayment Calculator

Let visitors know how long it would take to get out of debt. This quick and easy credit card repayment calculator is a great way to generate leads.

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Celsius to Fahrenheit Calculator

Easily switch between Celsius and Fahrenheit with our versatile temperature converter.

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Fundraiser Order Form

Make online fundraising a breeze and help volunteers raise money for your nonprofit.

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Bakery Order Form

Boost sales and eliminate paperwork with this simple bakery order form.

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Price Quote Calculator

Gather necessary data from clients to calculate and provide accurate price quotes for your services.

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Check Request Form

Level up business operations with the check request form! Request a check to pay bills or make purchases from your business accounts.

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Area Calculator

Find the area of a square, rectangle, circle, or a triangle with a 90° angle using our Area Calculator Template.

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Pay Raise Calculator Form

Easily calculate what your salary will be after a pay raise.

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Square Root Calculator

This calculator is great for solving square roots, which are notoriously difficult to calculate.

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Girl Scout Cookie Order Form

Want a better way of selling Girl Scout cookies? Collect orders without knocking on doors or sitting outside the grocery store.

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YouTube Money Calculator

Use this <a href="">lead magnet</a> to tell visitors how much money they can make via YouTube. This is the ad revenue calculator for you.

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Employee Evaluation Form

An employee evaluation form template can make human resources easy. This template will help your team fly through performance reviews!

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Statistical Significance Calculator

Calculate the statistical significance and P-value with this calculator.

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High School Calculator

A quick and easy form that can calculate a GPA in a matter of moments.

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Expense Reimbursement Form

A form that can allow you to easily gather expense reimbursements in any setting.

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Student Budget Calculator

This handy student budget calculator will help students figure out expenses and income while attending a university or college.

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Margin of Error Calculator

Use this calculator to find the margin of error.

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Shelf Life Calculator

Calculate the shelf life of any food product with this calculator.

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Instant Estimate Form

Provide prospective clients an instant estimate requesting your services.

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Cubic Yard Calculator

Gather input data from users to calculate cubic yardage quickly and accurately.

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Deposit Form

Issue a receipt for funds accepted through cash deposit, checks, money order, and cashier’s check.

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A/B Testing Calculator

Quickly analyze A/B test outcomes with our calculator.

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Free Estimate Form

Whether you're in construction or any industry, use this template to generate the estimated cost for your customer's needs.

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Drywall Calculator

Collect project-specific details from users to calculate drywall requirements efficiently.

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All the Calculated Form Fields You Need

Creating a form with calculated fields has never been so easy. Formidable forms has dozens of form field types to help you build calculators however you choose. Form elements range from radio buttons and sliders to total fields and product fields - all working together flawlessly.

Stylized image depicting how Formidable Forms supports several field types, namely a date field, a slider or a radio selection field.

Supercharge Your Lead Generation Strategy

A calculator could be one of the biggest lead magnets on your WordPress site. And since Formidable is also a form builder, you can handle all your WordPress forms within a single plugin.

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Start Building Online Calculators Today

Creating forms with Formidable takes just minutes.

Does What Other Calculator Plugins Can’t

The problem with most calculator WordPress plugins? They do just one thing. Formidable Forms is a powerful form builder where calculators are only the beginning. With a giant library of plugin templates and unlimited customizations, it's easy to see why 300,000+ businesses have given us a 94% satisfaction rating.

Fast & Easy Calculator Creation

With Formidable, creating calculators is easy. Our drag and drop form builder allows you to create calculators with just a few clicks - no coding required.

Stylized image depicting how easy it is to add fields to a form with Formidable Forms.
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Advanced Data Control

Run calculations and use them! Visually display your data however you want with Formidable Views and Graphs. Create custom reports, dynamic member profiles, and much more, all in real-time.

Ready-to-Go Calculator Templates

Start with a template, then make it your own with a simple drag-and-drop builder. Create instant quotes, cost calculators, retirement calculators, loan calculators - we cover all the basics so you can finish in just a few clicks.

Stylized image depicting how templates make creating forms with Formidable Forms faster.
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All the Integrations You Need

Formidable Forms integrates with all the top platforms. Connect your favorite add-ons: payment platforms, email marketing services, CRM's, automation, and more.

Simple or Advanced Calculators - You Decide

With Formidable, you can calculate more than just interest rates. Create simple quote calculators and cost estimates with addition and multiplication functions. Or ramp things up with more advanced math calculations to build anything you can imagine. Build websites the way you want.

Stylized image depicting how Formidable Forms can be used o create a life insurance or length conversion calculator.

More than just a WordPress Calculator Plugin

Powerful online calculators are just the beginning. Formidable Forms comes with tons of other features that will help you create whatever you can imagine. See for yourself why our calculator form builder is loved by everyone from developers to independent businesses.

Try Formidable Forms Risk-Free for 14 days

Stylized image depicting how easy it is to build forms with Formidable Forms. The image shows a list of field types that can be inserted into the form by drag-and-drop.

Here's What Our Community is Saying:

Formidable Forms has allowed me to accomplish the styling, simplicity, and customization I desired. I wouldn't have been able to create this application if it weren't for the built-in calculator functions, amazing support staff, and detailed technical documentation on the Formidable website.
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Leigh Neary
It’s a natural for building staff directories, resource libraries, and similar applications that collect and display data on a site. It is also a very strong tool for building front-end data collection forms requiring conditional workflows, calculations and other advanced features.
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Dan Bashaw

Frequently Asked Questions & Resources

Do you have a question about Formidable Calculator Forms? See below for our most frequently asked questions.

Who Can Benefit From a WordPress Calculator Plugin?


  • Mortgage Brokers
  • Financial Institutions
  • Investment Advisers


  • Nutritionists
  • Gyms & Health Centers
  • Personal Trainers


  • Teachers & Professors
  • Schools & Tutoring
  • Online Courses


  • Online Stores
  • SAAS Businesses
  • Marketplace Sites


  • Influencer Blogs
  • Corporate Blogs
  • Niche Blogs

Service Providers

  • Local Services
  • Online Services
  • Many More!
Are Formidable calculator forms for me?

If you run a WordPress site and you want to publish online calculators, you should use Formidable. The biggest advantage of using Formidable? It does more than just calculators. It can be used for contact forms, reports, landing pages, and everything else a drag-and-drop form builder can do.

What do I need to use Formidable Forms?

All you need is a self-hosted WordPress website. You can also install Formidable Forms on your client's WordPress sites if you are a developer. Unfortunately, our plugin does not work on non-WordPress sites.

Do I need coding skills to use Formidable Forms?

Absolutely not. You can create and manage forms without any coding knowledge. If you do have coding skills, you'll be able to tweak your forms in more detail. But coding is not needed to get the most out of our plugin.

How do I create a calculator in WordPress?

Creating a calculator is easy when you use Formidable. The best way to get started is by using one of our templates. From there, you can see how our calculated form fields work together to output calculations.

That may sound like a whole lot of math, but if you are reading this, we are certain you can handle it with ease!

Read more: How to Create a Calculator in WordPress

How do I add a calculator to my WordPress site?

Adding a calculator to your WordPress site is just as easy as copying and pasting. With Formidable shortcodes, you can place a calculator anywhere on your site. That means you can place them on a page, post, sidebar, footer, or any widget area.

How do I create a calculator widget using WordPress?

Creating a calculator widget with Formidable could not be easier. All you need is a theme with a widget area. From there, just take a form shortcode and copy it into a text or HTML widget. That's really all there is to it!

Do Formidable calculator forms integrate with WooCommerce?

100% yes. This is one of the biggest advantages of using Formidable to complement your WooCommerce setup. Formidable Forms can effectively replace each and every WooCommerce extension - saving you hundreds of dollars every year.

Because Formidable can fully replace any cost calculator plugin, it works as a cost calculator builder that can store product info and perform field calculations.

Why are calculators great for lead generation?

Calculators are engaging and interactive tools that keep people on your site. Users also love tools that make their life easier. Calculators make them feel like they’re getting a free service that would normally cost them money.

And with Formidable Forms, you can create calculators that also collect contact information. This could be used to generate hard leads (quote calculators) or build soft leads by adding users to your email list.

How do I design an effective calculator?

When designing an online calculator, the best place to start is with a template. Formidable’s templates are simple, sleek, and fit into any WordPress theme.

When designing an online calculator you also want to think carefully about your audience and the ways they will be using your calculator. Pretty soon your problem will shift - you'll have too many effective ideas and not enough time! Good thing our templates take only a few minutes to publish on your WordPress site!

Read more: 6 Ways to Use Calculators on WordPress Sites

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