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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75148

Verifiers

Verification ISBN preview

Jak sprawdzić numer ISBN?
Jak zweryfikować numer ISBN?

Calculator allows you to verify the ISBN number entered.

62110

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.

51998

Verifiers

Verifier numbers EAN-13 preview

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

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Generators

Pseudo-random number generator without repetition

Calculator generates random numbers without repetition from 0 to n-1.

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Math

Roots of a quadratic equation

Calculator based on the entered coefficients calculated roots of a quadratic equation.

43522

Calendar

Calculator seniority in Poland

Calculator to calculate the total length of service after the date of employment or dismissal.

57283

Financial

Net return on sales (ROS)

Calculator based on the values entered and net profit calculated return on sales ROS. ROS announces net income (after tax), attributable to every penny of products, goods and services.

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Savings

LPG Calculator - Cost-effectiveness of the gas system in the car

The calculator calculates the savings resulting from the installation of the system in the car LPG gas system.