
Product Calculator – do the math for your customers
Customers enter dimensions and the calculator works out how many packs they need. For flooring, tiles, roofing and pools, with your own formula. 30 days free.
Install the add-on
Do the math
This is how the calculator looks on a product. Change the dimensions and watch the number of packs and the price. The store and products are made up.

Light oak laminate flooring
In stock
Area calculation:
Pack size: 1.49 m²
Area: 12 m²
You need: 9 packs
Formula in the settings: (a*b)*1.1
Install the add-on
Customers don't have to calculate or guess
People buying flooring or tiles often don't know how much to get. They miscalculate, call you, or leave. The calculator shows the number of packs right on the product.
They buy the right amount the first time and don't run out of material halfway through. Turn on a cutting allowance and it's included in the calculation.
What the add-on does
1D, 2D and 3D calculations
Length, area or volume, depending on what you sell.
Your own formula
Write the calculation yourself, for example (a*b)*1.1 with a 10% allowance.
Your own dimensions and units
Width, depth, meters, liters or kilograms, named to suit your range.
Minimum and maximum dimensions
Customers can't enter a value you can't supply.
Only where it makes sense
Turn it on for selected categories or only for a custom variant.
Pack size from the product
Taken from units of measure or a parameter, with no separate entry.
Where it works well
Flooring and tiles
Area
Customers enter the room and know how many packs they need.
Roofing
Area and allowance
A calculation based on roof dimensions, including an allowance.
Pool chemicals
Volume
The amount based on pool volume.
Building materials
Quantity
Paving, bricks or insulation.
Trims and cables
Length
A calculation based on length.
B2B range
Wholesale
Larger purchases where an exact calculation matters.
How you set it up
- Install the add-onFrom the Shoptet catalog. The first 30 days are free.
- Create a ruleChoose the number of dimensions and the categories it shows in.
- Name the dimensionsNames, units and the text above the calculator.
- Write the formulaFor example a*b for area, optionally with an allowance.
Pricing
Monthly
€8
- 30 days free, for the first installation only
Yearly
€92
- 4% cheaper than paying monthly
- 30 days free, for the first installation only
Prices exclude VAT and match the Shoptet catalog. If you don't uninstall the add-on before the trial ends, it moves to the paid plan.
Install the add-on
From the add-on's authors
We develop and support the add-on ourselves. We can prepare special formulas or links to other systems.
Frequently asked questions
How much does the Product Calculator cost?
What can the calculator work out?
Does it have to be on every product?
Where does the pack size come from?
Add-ons for Shoptet
Extend your Shoptet with smart add-ons. We offer ready-made solutions and custom development – from Product Linking through Contact Forms to the Product Calculator.

Product Linking – variants without limits

Contact Forms

AR Viewer – products in 3D

Text Replacer

Text Selection Pop-up
Who do we already develop for on Shoptet?
And what do they say about us?
We value every piece of feedback. We listen to our clients and stay open to both praise and criticism.
★★★★★4.9 / 545 reviews on Shoptet PartnersWant to sail with us?
A quality website can easily become your best employee. It will make you money 24 hours a day, 365 days a year, with no salary and no vacation. All you have to do is start.
Call the Captain
Call +420 728 089 029 and Tomáš – the captain of our ship, the captain of our team, the owner – will definitely pick up.
If you'd rather write than call, email us at jsme@webotvurci.cz. A member of our crew usually replies within 24 hours.
Houbalova 3023/8, Líšeň
628 00 Brno
Company ID: 08320004, VAT ID: CZ08320004

