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.

62979

Verifiers

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

52948

Verifiers

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

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Medical

The calculator based on your input deficit of carbohydrates.

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Calendar

jak obliczyć dzień tygodnia na podstawie daty?

Calculator gives what day of the week for the date specified by the user.

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Life

On the basis of the data entered, the amount of drink and the percentage of alcohol content calculator calculates pure ethyl alcohol that we consume.

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Information technology

Calculator specified key encrypts the text using the Caesar cipher. Are accepted only letters, other characters are ignored.

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Financial

Calculator allows you to see what gives you the right amount of turnover for exemption from VAT if you started a business during the year.