uCoz

This plug-in provides an opportunity to automatically integrate calculator. This way you don’t need to place the code manually, all you need to do is authorize access from the uCalc account and choose an already made calculator from the list.
<a href="https://ucalc.pro" rel="nofollow ugc">uCalc</a> is a service that helps you create and maintain calculators to estimate services and delivery costs as well as build booking, review, feedback, and event registration forms. No special knowledge and operational fees are required. You can create a calculator by just dragging the blocks and putting together simple formulas like A+B=C. You are provided with the embed code that needs to be added to a website powered by any platform. The built-in calculator is edited through the service.
The builder has the following benefits:
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Ready-to-use templates and a collection of elements: a slider, button, drop-down list, checkmarks, contacts collection, date picker, etc.
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Completed orders notifications are sent to the owner or manager of the website via email or SMS
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Results with the opportunity to apply a promo code are sent to clients via email or SMS
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Design customization: background and text colors, fonts and color customization of the elements
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Display of several results, for example, with and without a discount
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Recognition of any currency and measure (weight, size, volume, product unit)
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Option to illustrate every element
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Widgets on the website automatically adapt for smartphones and tablets
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Check out the video to learn how to add a calculator with the help of the plugin: 
<iframe loading="lazy" class="youtube-player" width="750" height="422" src="https://www.youtube.com/embed/m_Usz8NP_RU?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en-US&autohide=2&wmode=transparent" allowfullscreen="true" style="border:0;" sandbox="allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox"></iframe>

uCalc

Create a costs calculator by simply dragging blocks, adding pictures and texts. It takes only 10 minutes, $0, and no special knowledge!

Mortgage Calculator

<a href="https://www.mlcalc.com/mortgage-calculator/" title="Mortgage Calculator" rel="nofollow ugc">Mortgage Calculator</a> is a great value-add for any mortgage loan officer or real estate agent looking to provide good-looking, functional, valuable mortgage content to readers. The execution of this mortgage calculator is superb from the smooth sidebar integration, modal window results and AJAX-based graphs that are incredibly visually appealing. It’s a great little loan application that delivers a lot of mortgage value in a user-friendly and well-executed way.
Shortcode
Use the mortgage/loan shortcodes on different pages:
<pre><code>[mlcalc]
</code></pre>
specify default mortgage values:
<pre><code>[mlcalc calculator="mortgage" size="narrow" price="125,000" rate="6.2" language="es" currency="eur"]
</code></pre>
Languages included: English, German, Spanish, French, Italian, Russian, Portuguese, and Albanian.
<a href="https://www.mlcalc.com/free-widgets/mortgage-loan-calculator/wordpress.htm" rel="nofollow ugc">WordPress Mortgage Loan Calculator Plugin</a>

Mortgage Calculator / Loan Calculator

Powerful mortgage and loan calculator widget with shortcode.

uCalc vs Mortgage Calculator / Loan Calculator