4741
Verifiers

NIP correctness in Poland

Jak sprawdzić poprawność numeru NIP?
Verifier allows you to validate the tax identification number entered

Tax identification number is a code used to identify taxpayers in Poland, which consists of 10 digits.



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Verifiers

Verification ISBN preview

Jak sprawdzić numer ISBN?
Jak zweryfikować numer ISBN?
Calculator allows you to verify the ISBN number entered.
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Verifiers

Verification of the social security number in Poland

It presents data deriving from the unique social security number, such as date of birth, sex, serial number and check its correctness.
31205
Verifiers

Verifier numbers EAN-13 preview

 Verifier numbers EAN-13 Calculator allows you to verify the number entered EAN-13.          
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Financial

Calculator selection taxation (global or general rules)

Calculator makes it easier to decide on one of the forms of taxation (lump sum - General)                        
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Building

Calculator floor panels

Calculator based on the dimensions of the area to put the panels and occupancy data on number of panels in one package, calculate how much you have to buy packages of panels to cover the entire room.                          
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Building

Insulation of wall

Jak policzyć izolację ścian?
Calculator allows you to calculate the amount of insulation panels needed to cover the walls of the building using the "light wet" or "dry light" methods.
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Life

Morse - translator

Translates written text into Morse code.      
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Physical

Resistivity and conductivity

The calculator calculates the resistivity and conductivity of the material from the resistance, cross-sectional area and the length of the element at 20 ° C.