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Number of tetrahedral

Tetrahedral numbers are the natural numbers, for which it is possible to construct a tetrahedron formnego of bullets. They are a special case of the pyramidal numbers.        


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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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Indicator of market price to earnings per share

Calculator to the data calculates the market price to earnings per share P / E. P / E indicates how many times the company's market value is higher than the profit earned during the year. Reflects the attitude of investors to the company. The increase in this ratio indicates that investors decide to pay for the shares of the company more than before.            
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Verifier ISMN numbers

Calculator allows you to verify the number entered ISMN (International Standard Serial Number Printing music).      
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The distance of a point from a straight

The calculator calculates the distance of the given coordinates of the line              
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Calculator child's blood group

Calculator based on blood group made ​​of both parents, given that they are owned by the child possible blood groups.
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Dilution of solutions

Legend of given volume and calculates the concentrations of the solutions before and after dilution of the volume of solution added is calculated.