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Best WordPress Plugins for Calculator

15 plugins compared · Updated August 2026 · Calculator

All Free only 15 Premium only

Choosing a WordPress plugin for calculator comes down to a few things: whether it is still actively maintained, whether real users rate it well, and whether it does the specific job you need without dragging the rest of the site down.

We ranked 15 plugins using our WPScore, which weighs the user rating (adjusted for how many people actually rated it), how many sites run it, how recently it was updated, and which WordPress version it is tested against. 15 of them have enough public data to be scored; the rest are listed below the ranked block, clearly marked, rather than being given a number we cannot justify.

How this list is funded. Some links here earn us a commission if you buy. It costs you nothing extra, and it does not move anything up the list — the order comes from the WPScore, which is calculated from public ratings, install counts and update history. See the method.

At a glance

  1. 1. Formidable Forms Best overall 93/100
  2. 2. Cost Calculator Builder 85/100
  3. 3. Calculadora de Frete e Campos Checkout para o Brasil 85/100
  4. 4. Mortgage Calculator 83/100
  5. 5. Responsive Mortgage Calculator 82/100
  6. 6. Loan Calculator WP 82/100
  7. 7. Product page shipping calculator for WooCommerce 82/100
  8. 8. Stylish Cost Calculator 82/100
  9. 9. Cost Calculator for Contact Form 7 81/100
  10. 10. Flexible Quantity 80/100
  11. 11. Currency Converter Calculator 80/100
  12. 12. WP Calorie Calculator 80/100
  13. 13. Royal Mail Shipping Calculator for WooCommerce 80/100
  14. 14. Simple Mortgage Calculator 80/100
  15. 15. Calculator Builder 80/100
1 Formidable Forms
Best overall Free by Strategy11 Team

Formidable Forms

The most powerful drag and drop WordPress form builder for contact forms, payment forms, calculators, quizzes, surveys, and data-driven applications.

4.8★
from 1,380 ratings
300k+
active installs
Updated
Aug 2026
Tested to
WP 7.1
93

WPScore

Read review View on WordPress.org
2 Cost Calculator Builder
Free by Stylemix

Cost Calculator Builder

WP Cost Calculator is a simple and powerful tool that lets you create price estimation forms. Easily give your clients information about your services …

4.5★
from 393 ratings
20k+
active installs
Updated
Aug 2026
Tested to
WP 7.0.4
85

WPScore

Read review View on WordPress.org
8 Stylish Cost Calculator
Free by Design

Stylish Cost Calculator

Cost calculator for WordPress: 🌟 Engage visitors and boost conversions with interactive calculations, lead capture, and payment integrations.

4.8★
from 175 ratings
1k+
active installs
Updated
Jul 2026
Tested to
WP 7.0.4
82

WPScore

Read review View on WordPress.org
10 Flexible Quantity
Free by wpdesk

Flexible Quantity

WooCommerce price calculator. Sell products by unit, dimension or volume. Calculate quantity increment and final price for a new unit of measure.

4.3★
from 9 ratings
2k+
active installs
Updated
Aug 2026
Tested to
WP 7.1
80

WPScore

Read review View on WordPress.org
12 WP Calorie Calculator
Free by THE BELOV

WP Calorie Calculator

For all experts in fitness, health & calories-dependent nutrition or sports: meet the most effective marketing feature for your WordPress website!

4.7★
from 12 ratings
1k+
active installs
Updated
Aug 2026
Tested to
WP 7.1
80

WPScore

Read review View on WordPress.org