Here are some useful WordPress calculator plugin which allows your user calculate prices, savings, delivery prices, needed amounts of products and also let you build any custom calculator and add it to your WordPress website.
It is a powerful and easy-to-use calculation and appointment plugin for WordPress. This unique tool allows you to easily create price estimation forms to give your client idea of the cost of your service.
This is a flexible plugin which allows you to build your estimation forms on few easy steps using a simple yet powerful drag-and-drop form creator.
This is a simple wordpress plugin, helps you to build multiple user friendly calculators with dynamically created form fields. You can create ajax based dynamic calculators within minutes.
WP Cost Estimation & Payment Forms Builder
Easily sell any customized services & products creating your own flat and responsive cost calculator or payment forms on your wordpress website. It is also able to do distance calculations and complex custom calculations, using powerful and intuitive visual tools.
WooCommerce Cart Based Shipping
It allows you to set different shipping rates based on the items a customer has in their cart. There are three calculation methods: by the subtotal price, by the number of items in the cart, and by weight. For example, the higher the subtotal or weight of the cart, or the more items a customer is purchasing, the higher the shipping rate may be. You may also set this feature to be available only to certain countries.
This is a fully featured plugin that gives a possibility to add any custom options to your WooCommerce products as well as enables custom price calculation based on any maths formula.
WP Amortization Calculator
This is a professional, high quality, and highly customizable calculator that can be used for Mortgage, Auto or any kind of amortized loan. It can be inserted on a page or used as a widget, even multiple times.
Contact Form Seven 7 Cost Calculator
Price Calculation which allows you to easily create quote or price estimate forms for Contact form 7.
Table Rate Shipping
This is used to easily setup shipping charges based on shipping class, total weight, total price, total quantity and total volume of products in cart.
MWP Diet Calories Calculator
You can display the calculator form in different layouts, and you have a different set of admin options to customize it.
WooCommerce Variation Price Hints
Want to make it easier for your customers to look up prices for variations? This extension can help. It lets you display price differences for any selection.
WooCommerce Measurement Price Calculator Plugin
It allows you to sell product based on the price by unit of measurement (Price per meter, foot, Sqft, Cubic yard, Mile, Kilometer, etc). Instead of forcing customer to buy products in fixed sizes or quantity let them enter their measurement and calculate the exact price based on their input.
Cryptocurrency Mining Calculator Widgets
This plugin allows you to easily add various types of cryptocurrency mining calculator widgets to your WordPress website.
It will help to get project orders from the clients for the people like web developers, corporates and freelancers easily. This form is paypal integrated and also have many awesome features.
ez Form Calculator
This is an intuitive multi-purpose form creator for WordPress. You can create simple form calculators, advanced cost estimators or extensive contact forms for both yourself and your customers.
Cost Calculator Contact Form 7 make to cost calculation setup for that field between each other
An even simpler plugin for creating calculators is stepFORM.
Thank you for sharing these low cost options on wordpress calculator plugins.
https://wordpress.org/plugins/orange-form/ is good plugin for calculation