Running a WordPress blog taught me this valuable lesson: readers want content they can actually use.
That’s why I started experimenting with adding calculator forms to my sites. The result? My audience instantly became much more engaged.
You can use calculators in lots of different ways. You might create a recipe converter to help readers scale ingredients, or add a BMI calculator to your fitness blog. A shopping cost calculator can also help stores reduce their cart abandonment rate by being transparent and upfront about pricing.
The best part? You don’t need to hire an expensive developer or struggle with complicated code. You can do everything yourself!
In this guide, I’ll show you how I build any calculator I need in minutes, using a simple drag-and-drop plugin.
Why I Love Having a Calculator on My WordPress Blog
When I started my WordPress blog, I was obsessed with long articles. I used to think the more words, the better. But I’ve learned that readers really only care about what they can use and act on.
Essentially, they want actionable content.
That said, I’ve found that adding an interactive tool, like a calculator, is the best way to make my site useful for visitors.
In fact, a good calculator lets visitors figure things out right there on the page. For example, if you run a fitness blog then a Body Mass Index (BMI) calculator can help readers check whether their weight is within a healthy range.
If you run a WooCommerce store, then there’s lots of reasons why people might abandon their shopping cart. However, surprise costs at checkout are a major culprit. I’ve been there myself – I hate unexpected charges when I’m trying to shop online.
By adding a simple shipping cost calculator to your store you’re being upfront and transparent about these costs. This instantly builds trust with your audience, which is a powerful way to reduce abandoned carts.
And if you sell internationally, you may have noticed that international shoppers often struggle with conversions. Why not make things easier? By adding a simple unit conversion calculator (like imperial to metric), you can remove a lot of friction from the purchasing process.
That all said, I recommend taking a look at your WordPress site and considering whether a simple calculator form could help your visitors act on the information you’re giving them.
My Simple Method for Building a Custom Calculator
I’ll be honest, I really don’t enjoy struggling with code. As a blog owner, I like to keep things simple, and that means using the right tools. That’s why I use WPForms for all my custom calculators.
WPForms is a popular form builder plugin that comes with a drag-and-drop builder, so you don’t need to hire a developer every time you want to create a form. That saves me a ton of time and money.
However, the thing I like best about WPForms is its ‘Calculations addon.’ This lets you build almost any calculator you can imagine: maybe you want to help visitors calculate a mortgage payment, find the best shipping discount, or figure out how much to tip.
I’ve used this specific addon on several different sites, and it always handles the math flawlessly. It just works – and that’s exactly what I need.
Setting up Your Calculator Plugin
To start, you’ll need to install and activate the WPForms plugin.
If you’ve never done this before, don’t worry. We have a beginner’s guide on how to install a WordPress plugin, which walks you through the entire process.
There’s a free lite version of WPForms that includes many essential features. However, you’ll need the Pro or Elite version to unlock the essential Calculations addon.
After activating the plugin, head to WPForms » Settings in your WordPress dashboard. Here, paste your license key into the ‘License Key’ area.
You can find this key by logging into your WPForms account, or by checking the email you got when you bought WPForms.
After entering your license key, the next step is installing the Calculations addon. To do this, go to WPForms » Addons in your WordPress dashboard.
Here, scroll down until you see the Calculations addon and click its ‘Install Addon’ button.
Once that’s done, you’re ready to start creating your first calculator form right inside WordPress.
Choosing a Calculator Template
Now you’ve activated the plugin and addon, go to WPForms » Add New Form in your WordPress dashboard.
This takes you to the ‘Select a Template’ page.
On this screen, give the form a clear, descriptive name. For my blog, I always use something like ‘Monthly Payment Estimator’ or ‘Shipping Cost Tool’ depending on the kind of calculator I’m creating.
On the left side of the screen, you’ll see all the different template categories.
Go ahead and click ‘Calculator’ to see all the different calculator templates you can start with.
I always use a template, as it’s much faster than trying to build everything from scratch.
For this guide, I’m using the ‘Shipping Cost Calculator Form’ template since that’s something I think every eCommerce store needs. However, the steps will be the same no matter which template you choose.
Simply hover over the template you want to use and click the ‘Use Template’ button when it appears.
Customizing Form Fields
WPForms will now load your template in its drag-and-drop editor.
On the right, you’ll see a live preview of the form, which is exactly what your visitors will see.
On the left are all the fields you can drag and drop onto your form if you need to add anything extra.
You can reorder the form fields by dragging them around in the preview. I always arrange my fields logically so visitors don’t get confused – I find that’s the key to getting high completion rates.
To edit a field, just click to select it in the preview. The settings for that field will instantly appear in the left-hand menu, so you can change things like the ‘label text’ or mark that field as ‘required.’
Never Miss an Email: The Confirmation Trick
If your form doesn’t already have an ‘Email’ field, then I strongly recommend adding one so you can collect leads from your calculator form. To do this, find the ‘Email’ field in the left-hand menu and drag it onto the preview.
It’s also a good idea to activate that field’s ‘Enable Email Confirmation’ slider. The reader will then need to type their email address in twice. This may seem like a small detail, but it’s really important because it dramatically reduces typos.
I’ve learned that a typo in the email field means I lose a potential customer forever since I can’t contact them, so I always activate this slider.
Working with the Calculator Formulas
If you’re using a calculator template, then WPForms automatically adds the necessary formula for you, so you typically won’t have to worry about the math.
However, at some point you may want to adjust how the form works or even build a totally custom calculator from the ground up.
In that case, you’ll need to know how to edit formulas.
To check a formula that’s provided by the template, just find the field that shows the final result. In my example, that’s the ‘Estimated Shipping Cost’ field. Simply select this field and then click the ‘Advanced’ tab in the left-hand menu.
You’ll now see the full formula.
You could edit this formula manually, but that takes a lot of time and effort – especially if you’re like me and prefer to skip the tricky math. In my experience, it’s much faster and easier to use WPForms’ built-in AI.
This is one of my favourite features, as you simply describe what you want the calculator to do. For example, I might type something like: ‘Apply a 10% shipping discount on orders over $150 and then increase the discount by 1% for every additional $50 spent.’
To get started, click the ‘Generate Formula’ button.
You can now type in your instructions. For the best results, try to be extremely specific when describing your calculation requirements. As a general rule, more information provides a better output.
After typing in your instructions, click the ‘Enter’ button.
WPForms will then generate the correct formula, and you can add it to your form with a single click.
Publishing the Calculator Form
When you’re happy with how your form looks, don’t forget to click the ‘Save’ button at the top to store your settings.
Now, it’s time to publish your form. Thankfully, WPForms makes this very easy.
Just open the page or post where you want to add the calculator. Then, click the ‘+’ icon and start typing in ‘WPForms.’ When the right block appears, click to add it to the page or post.
Next, open the dropdown menu and select the calculator you just created. WPForms will then instantly embed the finished form right into the page or post.
You can now make any changes to the page, such as adding a title or some intro text. Before I hit ‘Publish,’ I also preview the page, just to double-check how everything looks.
If you’re happy to make the form live, you can click the ‘Update’ button (for an existing page) or the ‘Publish’ button (for a new page or post).
With that done, just visit your live website to see the calculator in action.
How I Tweak My Calculator After It’s Live
As a blog owner, I’m constantly testing things out. I’ve learned that you can always improve your website, so I’m always looking to see what helps me get more email sign-ups or conversions.
Later on, you may decide to tweak your calculator form to see if you can get better results. For example, you might make the ‘Email’ field mandatory. That’s a fantastic trick to collect more leads.
It’s really easy to fine-tune an existing form. You just need to get back to the drag-and-drop builder.
In your WordPress dashboard, go to WPForms » All Forms. On this page, you’ll see a list of every form you’ve built using WPForms. I really appreciate how organized this page is.
Simply find the form you want to edit and hover over it.
When it appears, click the ‘Edit’ link.
This loads the form in the WPForms editor.
Now you can change the existing form fields, or add brand new fields following the same steps we talked about before. I love this flexibility because it lets me adjust my marketing strategy anytime I need to.
Once you’re finished customizing, don’t forget to click the ‘Save’ button. These changes will then appear instantly on your business website or blog.
How I Look at the Data from My Calculator
It’s really important to know what people are doing with your calculator once it’s live. After all, you can’t improve what you don’t measure!
When someone fills out a form on your site, WPForms automatically saves that entry to your WordPress database. This means you can see exactly how people are using the tool, and capture their contact information.
To see this valuable data, go to WPForms » Entries in your WordPress dashboard.
Here, scroll down to the ‘Form Name’ section.
Now, find your calculator form and click its name to see all the submissions for that specific form.
On the overview screen, you’ll see key information about each submission, such as the person’s name, their email address, and the exact date when they filled out the form.
For even more information, click the ‘View’ link for that entry.
When I’m reviewing submissions, I always try to keep my entries organized.
To start, I mark my hottest leads as a favorite entry by clicking the star icon so that it turns orange.
You can also switch a submission’s status from the default ‘Unread’ to ‘Read’ by clicking the circle icon.
I personally like this feature because WPForms has dedicated tabs where you can filter all your form responses based on whether they’re read or unread.
You can also deal with unwanted submissions in a few different ways.
To mark an unwanted submission as spam, simply click its ‘Spam’ link. WPForms will then move it to the ‘Spam’ tab.
Alternatively, you can permanently delete a submission by clicking its ‘Trash’ link.
By using these features carefully, you can keep all your form submissions organized, no matter how many you get.
Sharing Data with Clients (Exporting)
Sometimes, I need to share data with people who don’t have access to my WordPress dashboard.
WPForms makes this easy. You can export all your form data as either a CSV or XLSX file by clicking the ‘Export All’ link at the top of the page.
This opens a new screen where you can choose exactly which form fields you want to include in the file.
I think this feature is great because I don’t have to export any data that I don’t need.
You can also select a date range for the information you want to export.
By default, WPForms exports all your data in CSV format. If you want an Microsoft Excel file instead, then check the box next to ‘Export in Microsoft Excel (.xlsx).’
When you’re happy with how the export is set up, go ahead and click on ‘Download Export File.’ WPForms will then instantly download the file to your computer.
FAQs About Calculator Forms
Do you still have questions about using calculator forms on your WordPress website? I’ve definitely got a lot of questions about this topic from other WordPress users.
To help you out, I’ve put together my answers to the most common questions I hear about WPForms and the Calculations addon.
- What is a calculator form and why should I add one to my WordPress site?
A calculator form is simply a tool that lets visitors figure something out directly on your website. Crucially, they don’t have to leave the current page to get their answer.
You can use them for BMI calculations, mortgage cost estimates, figuring out shipping prices, or even working out custom discounts.
I’ve found that adding a calculator to your site is one of the best ways to get people involved with your content. It’s a great way to boost engagement, provide more value to your readers, build trust, and get more conversions.
I think you’ll agree that providing instant answers is much better than just giving general advice.
- What is WPForms and why do you recommend it for creating calculator forms?
WPForms is a popular WordPress form builder plugin. I personally recommend it because it’s incredibly easy to use. It has a drag-and-drop editor, so you can create all kinds of forms without any hassle.
More importantly, it has a dedicated Calculations addon. This lets you build powerful, complex calculator forms without having to write a single line of code. I really like that it handles all the complicated maths for you, behind the scenes.
- Do I need any coding experience to create a calculator form with WPForms?
No, you don’t need any coding experience at all. The drag-and-drop editor and the powerful Calculations addon let you build forms and calculators without even looking at any code.
Even better, WPForms has a built-in AI assistant. Simply describe what you want WPForms to calculate, and it’ll create the entire formula for you. You won’t have to write any complicated math, which is something I definitely appreciate.
- What does the WPForms Calculations addon do?
The Calculations addon lets you add mathematical formulas to your form fields. This means the form can perform calculations based on the visitor’s input, such as the specific numbers they type in or the different options they select from a menu.
I’ve seen this addon transform a regular, static contact form into a fully working, interactive calculator. This provides more value to your readers and is a great way to generate leads for your business.
- Is the WPForms Calculations addon available in the free version of WPForms?
No, the Calculations addon isn’t available in the free, lite version of WPForms. This addon is only available with a Pro or Elite license.
If you’re already using the free version of WPForms, then I’d suggest looking at all the other features you get with Pro and Elite, such as conversational forms and user journey reports. You’ll likely find that the upgrade is well worth the investment.
- Can I use a template to create my calculator form?
Yes, you absolutely can! WPForms comes with a wide range of ready-made templates, and I’ve found they really speed up the form-building process. It’s a huge time-saver, which is something I always prioritize for my own blogs and websites.
WPForms even has multiple templates that are specifically designed for calculators like the Commission Calculator Form, Tip Calculator Form, and Mortgage Calculator Form.
- What if I want to customize a template or build a form from scratch?
That’s a common question, and I can tell you that WPForms gives you tons of flexibility.
You can easily customize any template using WPForms’ drag-and-drop builder. I love this because I can start fast with a template and still tweak it to perfectly suit my audience.
Alternatively, if you want full control then you can start from scratch with WPForms’ ‘Blank Form’ template.
I hope you’re feeling really confident about building your own calculator form now.
Ready to grow your business even more? Then check out our ultimate WordPress toolkit: everything you need for your website. It’s my proven list of all the plugins, themes, and services I rely on to manage my traffic and keep my leads organized.
What a great idea! Thank you for sharing this information.
Only question is: can we see the template range before signing up for the premium version? That would help to see how relevant it is to a specific business.
Yes – you can see all the templates (along with demos!) here: https://wpforms.com/templates/