How To Create a WordPress Price Calculator for a Website

Tired of answering the same "what would this cost" question over and over by email? A price calculator on your website answers it instantly, the moment a visitor picks their options. In this guide, you'll learn how to create a price calculator for your website in 5 steps with Formidable Forms.

Approximate read time: 8 minutes

Why add a price calculator to your website?

A WordPress price calculator does one job: it shows visitors a real number instead of making them ask for one.

Here's why that matters:

• Faster decisions. Customers who can see the final price for their exact configuration (quantity, options, add-ons) buy sooner and abandon their carts less.
• Fewer repetitive emails. Service businesses can factor in hourly rates, materials, and margins so the calculator answers the "how much would it cost" question automatically.
• Better leads. When someone completes a pricing calculator, they've already qualified themselves. Pair the calculator with an email field and you have a lead magnet that captures buying intent.
• Instant quotes around the clock. Your calculator works at 2 a.m. on a Sunday. You don't have to.

The same setup works for product price calculators in online stores, cost estimate forms for contractors and agencies, and quote calculators for freelancers. We'll cover all three variations below.

What you need to build a WordPress price calculator

You need two things:

1. A WordPress website. Any theme works, since the calculator is embedded as a block or shortcode.
2. Formidable Forms Business. Calculator features, including field calculations and pricing fields, are included in the Business plan and higher. Business also removes the 3% transaction fee on payments, so if you plan to charge through your calculator, everything you need is in one plan.

Why not a free calculator plugin? You can start with one, but most free tools stop at basic arithmetic. Formidable Forms gives you conditional logic (show or hide options based on earlier answers), payment collection, quote emails, and 225+ form templates so you don't start from a blank screen.

If you want to compare options first, see our roundup of the best cost calculator plugins for WordPress. This post stays focused on the build itself.

With Formidable Forms installed and activated on your site, let's build.

How to make a WordPress price calculator in 5 steps

For this walkthrough, we'll build a product price calculator for a bakery that sells custom cakes. The same steps apply whether you're pricing cupcakes, consulting hours, or construction materials. Here's the plan:

1. Create your calculator form from a template
2. Add pricing fields and product options
3. Set up the live price calculation
4. Accept payments through the calculator (optional)
5. Publish the price calculator on your website

Step 1: Create your calculator form

From your WordPress dashboard, go to Formidable → Forms and click Add New. You can pick from 225+ pre-built templates or start with a blank form.

To save time, search the template gallery for "order form" and select the bakery order form template. It comes with product and total fields already in place, so you're customizing instead of building from scratch.

Name your form something recognizable, like "Cake Price Calculator," and click Create.

Step 2: Add pricing fields and product options

When the drag and drop form builder opens, you'll see the available fields listed on the left. Scroll down to the Pricing Fields section. These are the building blocks of every price calculator:

• Product: a field with a price attached to each option
• Quantity: how many the customer wants
• Total: the running sum, calculated automatically
• Payment: a credit card field for checkout (more on that in step 4)

Drag a Product field into your form. In the field options, choose how customers pick their product: Dropdown, Radio Buttons, or Checkboxes. Then enter each option's name and price.

Here's the Product field for our bakery example:

Option	Price
6-inch round cake	$45
8-inch round cake	$65
Two-tier cake	$120

Add a second Product field for upgrades like custom frosting (+$15) or a message plaque (+$10). Because each option carries its own price, every selection the customer makes updates the math.

Step 3: Set up the live price calculation

Now bring the math to life.

Drop a Quantity field into the form, then add a Total field below it.

Here's the part people expect to be hard: there's no formula to write. The Total field automatically multiplies each product by its quantity and sums everything in the form. When a visitor picks the two-tier cake with custom frosting and a quantity of 2, the total instantly reads $270.

Want more control over the math? Formidable Forms' field calculations can handle it. Add a Number field, open its advanced settings, and write a calculation using values from other fields, whether that's a percentage, an hourly rate, or any other custom formula.

Sales tax is the most common example.

Let your first Total field calculate the subtotal, use a Number field to calculate the tax from that subtotal, then bring in a second Total field to combine the two for the final price.

This Knowledge Base article on adding tax to the total walks through the exact setup.

A couple of tips before you save:

• Add Name and Email Address fields so every calculation doubles as a captured lead.
• The total won't update inside the form builder itself. Click Preview in the top right to test your calculator with live math.

When everything checks out, click Update to save.

Step 4: Accept payments through the calculator (optional)

A price calculator that shows a number is useful. One that takes the payment on the spot is a checkout.

First, connect a payment gateway. Formidable Forms supports Stripe, PayPal, and Square, and Stripe alone covers 15+ payment methods including cards, bank transfers, and digital wallets. On the Business plan, Formidable removes its added fee, so you only pay your payment processor's standard rate.

Back in the form builder, click the Settings tab, then open Actions & Notifications and choose Collect a Payment.

In the payment action, set the Amount to pull from your Total field so customers are charged exactly what the calculator shows. Adjust the description and currency, then hit Update.

Selling services instead of cakes? Business plans can also switch the payment type to recurring, which turns your price calculator into a subscription signup form.

Step 5: Publish the price calculator on your website

Time to put your calculator to work. Open the page or post where you want it to appear, click the Add Block icon, and select the Formidable Forms block. Choose your calculator from the dropdown, then publish the page.

Where you place it matters as much as how you built it:

• Product pages, so shoppers can configure and price before adding to cart
• Your pricing page, replacing the static table that makes people email you
• A dedicated instant quote page you can link from ads and emails
• Your homepage, where an interactive calculator doubles as a lead magnet

That's it. Your WordPress price calculator is live and crunching numbers.

Turn your price calculator into a quote calculator

Not every business wants to show a final, binding price. Contractors, agencies, and freelancers often need an estimate calculator that produces a ballpark quote and starts a conversation.

The build is nearly identical, with three changes:

1. Swap products for services. Use Product fields for service tiers (logo design, full brand package) and add-ons (rush delivery, extra revisions).
2. Label the total as an estimate. Rename the Total field to "Estimated price" and add a short disclaimer below it so nobody treats the ballpark as a contract.
3. Skip the payment action and email the quote instead. In Settings → Actions & Notifications, set up an email that sends the visitor their quote and sends you their contact details. Every estimate becomes a warm lead in your inbox.

You can go further with conditional logic. If a customer selects "commercial project," reveal extra fields for square footage or team size that feed the calculation. The estimate stays accurate without overwhelming residential customers with irrelevant questions.

Build a website cost calculator for your agency

One of the most popular uses of this setup is a website cost calculator: a form where prospects choose the number of pages, design complexity, and features like eCommerce or memberships, and see what their website project will cost.

If you run a web design agency, this is the highest-leverage calculator you can build. Structure it like this:

• Product field: site type. Brochure site ($1,500), business site with blog ($3,000), online store ($6,000).
• Product field: add-ons. Copywriting, SEO setup, logo design, each with its own price.
• Quantity field: number of pages beyond the base package, multiplied by your per-page rate.
• Total field labeled "Estimated project cost."

Prospects get an instant, realistic number, and you get a lead who already knows your pricing. That conversation starts miles ahead of a cold "request a quote" form.

Start calculating prices on your site today

You now have the full recipe: create a form from a template, add Product, Quantity, and Total fields, connect a payment gateway if you want to sell directly, and publish the calculator anywhere on your site. The whole build takes minutes, not days, and it works whether you're selling cakes, quoting web design projects, or estimating construction costs.

If you want to see what else form-based calculators can do, from mortgage and BMI calculators to date and shipping calculators, read our ultimate guide to WordPress calculators next, or browse the full WordPress calculator plugin overview. And when you're ready to build, Formidable Forms Business has every field, calculation, and payment option you need.