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Formidable Team / Last Updated December 5, 2022

Create a WordPress Custom Calculator: Easy, Powerful Results

Looking to create a WordPress custom calculator? With a WordPress calculator plugin, make a shiny custom calculator in WordPress today! Here’s how.

Create a WordPress Custom Calculator

Approximate read time: 6.5 minutes

When you think about calculators, what comes to mind?

Nightmares of tax season? Flashbacks to a high school math exam? If you connect calculators with awful math-based tasks, you aren't alone.

But we've got some good news: calculators don't have to be scary.

Formidable Forms is the best WordPress Form Builder plugin. Get it for free!

And in this post, we'll show you why.

So, let’s show you how to create a custom calculator for your website in a few easy steps.

  • How to create a WordPress custom calculator
    • Give your calculators superpowers with Formidable Forms

      How to create a WordPress custom calculator

      Looking to build a web calculator customized to your needs? 

      Here’s a step-by-step guide on creating a calculator in WordPress using Formidable Forms, the best forms plugin for WordPress.

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      First, you’ll need a license key with Formidable to build your custom calculators. So head to our pricing page and grab the plugin at one of our excellent prices.

       Create Your Calculator Now!

      Once you’ve installed and activated the plugin, you can start following the steps.

      Here's how to create a WordPress custom calculator in three easy steps:

      1. Create a form and add number fields
      2. Create a Total field
      3. Add extra fields (optional)
      Formidable Forms pro plans

      Step 1: Create a form and add number fields

      First, you must start a new form to build an online calculator. 

      To do this, go to your WordPress dashboard, and Formidable → Add New. Select Blank Form, then give it a name, and it will take you to the form builder.

      Next, it’s time to add some form fields.

      And it’s easy with Formidable’s drag-and-drop form builder. To start building, choose the field, and drag it to the form. 

      Formidable's drag-and-drop builder is easy to use

      That’s it.

      So, for a percentage calculator, add three fields: the number, the percentage, and the value.

      Add a number field for custom calculators

      You can add more, like radio buttons, dropdowns, and more. But, for now, we’ll stick with this.

      No matter your calculator type, you want to set the number range for periods of time. This is great for things like the Loan Period for a loan payment calculator.

      Then, it’s also a good idea to fill out the Default Value, Placeholder Text, and Field Description boxes. This helps guide the user on how they should enter their info.

      Step 2: Create a Total field

      Total field calculation custom calculator example

      Now that you’ve got the primary number fields to calculate what you need, it’s time to add a Total field. 

      This is where the final calculation appears. The calculated fields form gathers your totals.

      First, let's go back to the percentage calculator. 

      In that example, the Total field represents the value (number * percentage = value).

      Next, with this Total Number field selected, go to the Advanced tab and turn on the Calculator option. 

      Then in the Default Value box, enter the formula for your calculation.

      The formula for a simple percentage calculator looks like this:

      [NUMBER FIELD #1] * [NUMBER FIELD #2]

      calculate field value

      Then, you replace the field IDs in brackets with the field IDs of your form.

      If you’re building a calculator for anything else, you must figure out the formulas or do some Googling. 

      Or, consider upgrading to use Formidable's pre-made templates. 

      Either way, don't let the math stop you from making your calculator.

      Step 3: Add extra fields (optional)

      Finally, add extra fields, like an Email field, to collect email addresses.

      To add a new field, look through the All Fields tab and find the one you want. Then add it to your form.

      And that’s how to create a custom calculator in WordPress. 

      But you’re not finished yet. 

      Now we need to display it on your website.

      How to add a calculator in WordPress

      Okay, so you’ve created your calculator, but how do you add a calculator to a website?

      Simple.

      First, go to the post or page on which you want to show the calculator and add a new WordPress block. 

      Next, search for Formidable, and add the Formidable WordPress block.

      Choose your calculator from the dropdown menu

      Last, choose your calculator from the dropdown menu, and you’re finished!

      Update your page/post, and you’re good to go.

      Give your calculators superpowers with Formidable Forms

      Formidable Forms WordPress plugin

      Now that you’ve learned how to make a custom calculator in WordPress, you’re only scratching the surface.

      No matter what type of simple calculator you need, all the power to make it is now in your hands.

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      Need to make a price calculator? How about a loan calculator? 

      It doesn't matter the type of online calculator for WordPress you need. Formidable is the WordPress calculator plugin for the job.

      Here are a few examples.

      Grow your business with Formidable Forms

      Let’s imagine you run a real estate business.

      A website calculator is one of the most helpful things you can offer customers. You can give them a way to calculate their monthly payment and interest rate to know if they can afford a house.

      And this applies to almost all industries!

      WordPress calculator user examples: fitness calculators, mortgage calculators, financial calculators

      Here are a few more examples of how you can use a calculator:

      • Physical trainers offering weight-loss or BMI calculators
      • Real estate agents helping people with a mortgage calculator
      • Businesses using PayPal order forms
      • Companies using ROI calculators to get better results
      • Business creating pricing based on large amounts with a measurement price calculator
      • Quote calculator for estimates

      A calculator is suitable for your website because it’s excellent for visitors. Helping them means helping yourself.

      You can also collect users’ email addresses for email marketing and lead generation. All you need to do is require an email to get the results of your calculator, and you are set!

      So, let’s show you how to make a calculator in WordPress with a plugin.

      Read More: 6 Ways to Use Calculators on WordPress Sites

      Use Formidable as a cost calculator builder

      Do you have an eCommerce site and want an easy way to show prices to customers?

      Then Formidable Forms is the perfect cost calculator plugin for WordPress for you.

      Calculating totals in real time is easy with Formidable

      A cost calculator builder is the only employee you need. And a good one simplifies things for you enough that you barely have to do anything. 

      Well, that’s exactly what you get with Formidable:

      • Automatic price calculation
      • WooCommerce integration
      • Pre-made calculator form templates
      • Visual Form Styler to create a stylish cost calculator

      So, whether you’re selling 100,000 products a month or 10, Formidable is here to help you.

      Help people manage finances with a WordPress custom calculator plugin

      Imagine you own a car dealership and help customers find the best financing for their cars.

      Formidable’s car loan calculator template helps you get a calculator on your WordPress website fast. 

      Create a custom calculator in WordPress for your car business

      And that saved time means you start helping customers today.

      You get a new business lead with each customer that fills out your car loan calculator.

      And this applies to any investment calculator type you need!

      Power up people’s fitness with a fitness WordPress custom calculator

      Body Mass Index (BMI) is a term that gets thrown more than a football on Sunday.

      But that’s because people are looking to find out theirs. 

      And what better way to attract people to your fitness website than with a BMI calculator that’s easy to use?

      Fitness calculators can take your site to another level

      Well, Formidable helps you do that, too.

      Formidable helps you create an online calculator that meets your needs. All of ‘em.

      All your calculators. One simple WordPress plugin and custom calculator builder.

       Get Your Ultimate Calculator Plugin!

      Are you ready to create your WordPress custom calculator?

      As you can see, using WordPress to create a calculator from scratch can be complicated. It’s possible, but it may involve figuring out formulas and doing some math.

      But no checking lines of code, changing input types, and other difficult tasks.

      If you’re wondering, “How do I add a mortgage to my WordPress calculator?” Don’t worry. We’ve got you covered. 

      You can easily add a mortgage calculator to WordPress with Formidable.

      And, Formidable doesn’t only handle calculators. Contact forms, quizzes, and anything else you can imagine are all possible with Formidable. 

      Now is your chance to make it happen. Get ready to make an online calculator!

      So, wondering, “How do I create an interactive calculator for my website?” Well, we answered that question, too. And you can find all your interactive content needs in this guide. It’s time to get your page builder and create a calculator website!

      Also, follow us on Twitter, Facebook, and YouTube for more great tips on how to make a calculator website!

      Read more WordPress calculator blog posts

      • Best WordPress BMI Calculator Plugins 7 Best WordPress BMI Calculator Plugins for Fitness Experts!
        Read More
        Best Investment Calculator Plugins for WordPress 9 Best Investment Calculator Plugins for WordPress
        Read More
        Best Mortgage Calculator WordPress Plugins 9 Best Mortgage Calculator WordPress Plugins for Real Estate
        Read More

      Did you know that Formidable Forms is one of the fastest WordPress form builder plugins available today? If you're not already using it, get started with our free plugin or the full-featured pro version!

      Using WordPress and want to get Formidable Forms for free?

      Get Formidable Forms Lite Now

      This article may contain affiliate links. Once in a while, we earn commissions from those links. But we only recommend products we like, with or without commissions.

      Comments

      1. milkboy31 says

        December 8, 2020 at 10:03 am

        I definitely agree about not adding a bajillion plugins to your site. Conflicts aside, abandoned plugins and security concerns abound. Thanks for adding this to Formidable!

      2. invisionstudios says

        December 15, 2020 at 7:29 am

        Formidable is our "swiss army knife" of plugins for WP. We install it on almost every site we develop. I'm not sure adding another small calc plugin is a big problem, but since we already have FF installed, it's easy enough to create things like calculators.

        • srwells says

          December 16, 2020 at 11:52 am

          Thanks for the kind words! Glad you love Formidable Forms.

      3. Sara says

        August 6, 2021 at 5:05 pm

        Do you have a solar energy calculator plugin?

        • srwells says

          August 9, 2021 at 1:48 pm

          Hi there, Thanks for your question. We don't currently have one, but our calculations are pretty powerful, so you could either create your own, or if you have an example to show us with the calculations involved, we could probably build a template to add to our library.

      4. Daveed Flexer says

        November 1, 2021 at 10:43 am

        Whenever recommending Formidable Pro to other WordPress users on forums or Reddit I always say that the biggest advantage is that the team adds new functionality regularly and seems to listen to the community. And here we have additional functionality I can add. Thank you

        • srwells says

          November 1, 2021 at 2:24 pm

          Thanks so much for recommending Formidable Forms! We really appreciate that. We are always working on new features to add more value to our platform. We hope you love what is coming next!

      5. trishacupra says

        November 1, 2021 at 7:44 pm

        My favourite calculator I created with Formidable Pro was a floor area calculator for a carpet company.

      6. [email protected] says

        November 11, 2021 at 12:25 am

        I love the computer functionality Formidable Pro.

      7. Stephen OConnor says

        November 12, 2021 at 6:05 am

        Very useful article on how to build a calculator with wordpress. I've found the team quite responsive and helpful.

        • srwells says

          November 12, 2021 at 7:41 am

          Thanks for the kind words…I’ll pass your praise on to our support team.

      8. [email protected] says

        November 14, 2021 at 12:10 pm

        My company switched to Formidable Forms abot 2 years ago after being frustrated with the horrible interface of Gravity Forms. Formidable is beautiful enough that our designers love it, and feature full enough to keep our developers happy!

        • Steve says

          November 15, 2021 at 11:57 am

          Thanks so much for sharing! We always love hearing about the things people love about Formidable Forms.

      9. jaroo says

        November 22, 2021 at 9:58 am

        This is great. Thanks for the tutorial. Excited to try it out on a project!

        • srwells says

          November 22, 2021 at 10:01 am

          Awesome! Calculators can add a lot of user engagement and make your site better! Best of luck on your project!

      10. esencial says

        November 23, 2021 at 12:33 am

        I think it could be a good idea to implement a calculator in the same page I have a real state offers, so the client could be calculate costs easily

        • srwells says

          November 25, 2021 at 11:43 am

          Yep, we have many pre-built real estate and mortgage calculators as well to make your life a bit easier.

      11. Siger Smit says

        November 23, 2021 at 8:16 am

        Nice!, love how versatile FF is!

      12. Dominik Luenstaeden says

        November 23, 2021 at 2:06 pm

        I love the possibility to addvalue to my content with easy-to-use calculators! Thanks a lot!

        • srwells says

          November 23, 2021 at 2:35 pm

          You're welcome! Glad you are enjoying the calculator functionality built into Formidable Forms.

      13. Phil Drysdale says

        November 24, 2021 at 5:04 am

        The sheer versatility of this plug-in continues to blow my mind. I'm amazed every time I find a new way to use it, pretty sure I'll end up using this on a new project I'm working on.

      14. cthomson says

        November 24, 2021 at 8:18 am

        Formidable is one of the most powerful WordPress plugins, yet it is easy to use. The premium templates offer great functionality. These guys know what they are doing and they do it right. The documentation and support are superb.

      15. [email protected] says

        November 25, 2021 at 2:13 am

        Its great to see what the possibilitys are with Formidable and Im very curious about future features thats why I use an Elite subscription.

        Great work guy's!

        • srwells says

          November 25, 2021 at 11:44 am

          Thanks for the kind words...We have some big plans in the works. Should be a fun and exciting year.

      16. [email protected] says

        November 25, 2021 at 4:45 am

        An amazing plug-in to have. I usually install this plug into my clients website. Since most of them are not technology savvy, I believe it helps them a ton due to the lack of technology experience that they might have otherwise. Great job formidable team

        • srwells says

          November 25, 2021 at 11:45 am

          Awesome! We always strive to make our customers look like rock stars for their clients. Part of this is making sure the transition when handing off a site to the client goes smoothly. Thanks for your Comment!

      17. Ben says

        May 3, 2022 at 12:44 pm

        Hi team!
        Well done on the amazing job! I love Formidable plugin so far.
        Quick question: could you possibly help me create a template for the calculator I want to build?
        It's a bit more complex than I can handle with the current options available. Do you mind if I run it by the team and you could point me in the right direction or help me create a bespoke template?
        It's essentially an annuity type pension calculator which should be a CTA to lead into an option for my customers to make an investment or set up regular savings.

      18. Rajiv says

        July 5, 2022 at 3:46 am

        Can we make a Vaccine calculator. Its simple adding formula that add on no of days in Date of birth entered by a person. Outcome is displayed as vaccine required every age milestone...If yes plz let me know.

        • srwells says

          July 5, 2022 at 1:01 pm

          Hi Rajiv,

          Our plugin can do limited date calculations out of the box. These typically include calculating the number of days between two dates, or calculating an age.

          Our plugin can't currently add days to a date so I don't think it would be a good fit for your application. This functionality is on our feature request list, but it isn't on our current roadmap, so I don't have an estimate on when it would be available.

      19. Unisco says

        July 8, 2022 at 2:10 am

        This blog is really helpful

      20. Radoslav Petrov says

        September 12, 2022 at 12:20 pm

        Hello,
        I want to create various calculators for my site, such as BMI, how much protein per day, how many calories per day, measure body fat at home, calculate calories burned RMR, etc.
        My question is will I be able to do it with this plugin?
        They should also be in Bulgarian, and I should point out that I have no coding skills!
        Thanks in advance,
        Rado

        • srwells says

          September 15, 2022 at 2:42 pm

          We have BMI calculators already built out and available as templates. You should be able to create calculators for these other items as well. No coding skills required.

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