MegaCalculator for Opencart - is a unique solution, which turns your online store into perfect sale instrument, which allows a customer to calculate a product, necessary quantity of a good or service, output other counted parameters of a product / service, and also has a lot of other capabilities.

DEMO - Laminate
Calculator in the product card
Calculator in the category
Calculator in a modal window in the category

DEMO - Paint
Calculator in the product card
Calculator in the modal window in the product card
Calculator in a modal window in the category

DEMO - Large format print
Calculator in the product card
Calculator in category
Calculator in the modal window in the product card

DEMO - Custom car clearance
Calculator in the product card
Calculator in a modal window in the category
Admin (eng):demo/demo
Admin (rus): demo/demo

MegaCalculator solves such problems:

• Product quantity calculation according to parameters entered by a customer, and also calculation and output of additional information.
  
• Setting up the output and calculation of related products’ quantity.
  
• An option for a client to order your product straight from a product card, without going to a cart / checkout page.
  
• Set up the appearance of a product card for certain products / categories.
  
• Possibility to calculate on a category page for a certain product as well as for all products which have a certain formula.
  
• Product quantity / option calculation when creating an order in the admin panel.
  
• The mechanism of copying options from one product to selected products / products of selected categories.
  

Version 4.2:

• In most cases there is no need to adapt MegaCalculator to an Opencart theme in the product card.
  
• Capability to add mega-related products in the formula editor, to group them by chapters, to show chapter sub-totals.
  
• Added the option to show shipping methods in Quick order.
  
• The setting to remove some options from the cart / order information.
  
• You can now copy a formula with all its settings.
  
• Possibility to output an action result to Checkbox, Radio or Select options.

Version 4.0:

• New convenient edit formula page with product card overview.
  
• Add interim formulas at once in one place.
  
• Now you can add most of math functions to a formula, and also logic ones (if, or, not)
  
• New feature - output a formula result into a selector, choose a selector by clicking an element in the product overview window.
  
• More convenient MegaCalculator settings interface, also you can customize the appearance of a product card for a certain formula.
  
• Now you can add a formula to a category - no need to add new products to a formula upon their creation.
  
• More flexible Number option settings (how to round, change by clicking +-).
  
• Possibility to calculate options and quantity by calculator by adding an order in the admin panel.
  
• More adaptive to different Opencart modules and themes.

The capabilities of MegaCalculator are vast. We tried to design the convenient instrument for creating various calculation schemes.

Full description here

Installation:

1. Make a backup copy of the database and site.
   
2. Download an archive for the relevant Opencart version.
   
3. Without unzipping the archive, upload on site by “Extension Installer” (“Extensions” ⇒ “Installer”).
   
4. Refresh the Modifications
   
5. Activate the module in Modules section
   
6. In System ⇒ Users ⇒ User Groups set rights for access / modify for necessary user groups - put checkboxes opposite catalog/optionformula
   

Some cases and examples:

Typography
https://xn--80akoss.xn--j1amh/t%D1%96shyu-pap%D1%96rosnij-pap%D1%96r/vodost%D1%96jkij-t%D1%96shyu-pap%D1%96r-b%D1%96lij-50kh70sm
https://ed-shop.md/Format_mare/Mes
https://postersprint.ru/112-4833-14-iq
https://packbox.com.ua/tsena-korobki-chetyrekhklapannoy-3-sl-gofrokarton/
https://tvorchi.art/Pechat-foto-na-sinteticheskom--olste-25-25-sm

Flooring, insulation
https://polygon-stroy.ru/index.php?route=product/product&product_id=9876
https://stk.lviv.ua/index.php?route=product/product&path=65_20_72&product_id=304
https://praktyk.com.ua/oak-hetmansky.html
https://insulationgo.co.uk/novia-vc2t-reinforced-synthetic-laminate-75m2-classe-flame-resistant-ideal-for-temporary-protection/
https://полы-россии.рф/index.php?route=product/product&path=60_79_207&product_id=569
https://3gnom.com/kafelnaja-plitka/plitka-laparet/kollekcija-monti/keramogranit-monti-grafitovyj-402h402-16210-sht-cb000004927
https://izomaxx.ru/gotovie-reshenija-sten/beskarkasnaja-zvukoizoljacija-steni-standart-plus.html
https://regstroy.com/stroitelnye-materialy-cat/teploizolyaciya/bazaltovaya-izolyaciya/uteplitel-isobox/izoboks-ekstralayt-31-kgm3-120060050h8-0288-m3up-1.html

Tabletop
https://newstone.com.ua/BA-205ROYALEBLANC_pryamaya

Conditioning
https://atmk.ru/raschet-osushitelej-vozduha

Doors
https://xn---48-eddjhv7d.xn--p1ai/mezhkomnatnie-dveri/finish-fleks/kollektsiya-gost/gost-0-l-12-milanoreh-092-0499/

Wallpaper
http://indoorstyle.ru/index.php?route=product/product&path=14_21&product_id=486
http://indoorstyle.ru/index.php?route=product/product&path=1_135&product_id=5032
http://indoorstyle.ru/index.php?route=product/product&path=15_132&product_id=3569

Paint
https://regstroy.com/lakokrasochnaya-produkciya/kraska-vodoemulsionnaya/

Repair
https://remontlyx.ru/usluga/kalkulyator-remonta-kvartir

Manual (English)
Manual (Russian)