The harmonic mean

Calculator based on the entered numbers separated by commas calculate the harmonic mean.

Long description

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Weighted average ratings

The calculator calculates the weighted average of the ratings of the following items.

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Conversion between number bases

Converter allows you to convert numbers between number bases - binary (binary), trójkowym, czwórkowym, Friday, szóstkowym, siódemkowym, octal (octal), dziewiątkowym, decimal (decymalnym) jedenastkowym, dwunastkowym, trzynastkowym, czternastkowym, piętnastkowym, hexadecimal (hex). Typed characters that are not numbers and the letters A, B, C, D, E, F are ignored.

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Trigonometric functions calculator

Calculator by entering an angle in degrees or radians calculated values of the basic trigonometric functions.

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Calculator social security contributions - the calculation of rates in Poland

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Calculator to calculate gross salary given social security contributions deducted from the salary of the employee and the employer. [since 2008]

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Calculator VAT refund for building materials

The calculator calculates the amount of VAT that can be refunded in respect of incurred expenses associated with the purchase of construction materials.

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Air conditioning calculator

Calculator helps you calculate the estimated power consumption for room air conditioner with the specified size and the number of people working in the space.

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Verification of the ISSN

Calculator allows you to verify the number entered ISSN (International Standard Serial Number serial publication). FAQ: How ISSN number?

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Number of wallpapers

Jak oszacować niezbędną ilość tapety?
Ile kupić tapety?
Jak obliczyć ilość tapety potrzebną do wytapetowania pokoju?

Calculator to estimate the necessary amount of wallpaper needed to wytapetowania room of the given dimensions.