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The harmonic mean

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

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Weighted average ratings

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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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The sum of squares of integers from 1 to n

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Iron deficiency

The calculator calculates the dose of iron necessary to adopt a parenteral route to compensate for the normal level of the common deficiency.      
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Settlement km - calculator, model in Poland

jak obliczyć kilometrówkę?
Calculator allows you to calculate the costs that can be refunded for use of a personal vehicle for business purposes.
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Building

Calculator number of floor tiles and adhesive

Calculator based on the stated dimensions tiles and floor area where they will be laid tile, calculate the required amount of tiles and tile adhesive to them.                      
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Caesar cipher

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