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Knowledge

Professional Engineering Calculations

Optimize your projects with precise pipe diameter selection and lightning-fast pressure drop calculations.

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Our designer calculator offers

Significant increase in productivity and efficiency in project work and on construction sites.
Lightning-fast calculations

Results in real-time, without unnecessary clicks.

Many modules

Calculators for various installations: heating, water-sewage, gas, ventilation.

Simple operation

Intuitive interface, available on computer and phone.

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1 Monthone-time payment
39 PLN+ VAT (23%)for 1 month
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6 Monthsone-time payment
195 PLN234 PLN+ VAT (23%)for 6 months
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12 Monthsone-time payment
390 PLN468 PLN+ VAT (23%)for 12 months
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You will find with us

Heating
Heating

Calculations for heating systems. Pipe diameter selection, pressure drops, valve authority, expansion vessel.

Ventilation
Ventilation

Calculations for ventilation ducts. Diameter selection, air velocity, pressure drops.

Water-Sewage
Water-Sewage

Calculations for water and sewage installations. Pipe diameter selection, flows, slopes.

Gas
Gas

Calculations for gas installations. Pipe diameter selection, power to flow conversion, pressure drops.

Books
Knowledge Base

Knowledge base. Articles about sanitary installations and calculators available on the site.

Unit Converter
Unit Converter

Unit converter. Conversion of pressure, volume, area, length and energy units. Single and multiple unit conversion.

User Reviews

"We've been using KalkulatorPro in our office for several years practically every day. Highly recommended!"

Marcin Pożyczka

"An invaluable tool in an engineer's work. Recommended!"

Jacek Konieczny

"Significantly improves work both in the office and on site. Recommended!"

Piotr Łabędź

"Fantastic tools! I use the calculators practically every day. They greatly speed up the work"

Marlena Sienkiewicz

"Intuitive, powerful, and constantly evolving tool. Great"

Piotr Golonka