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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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Number of square-triangle (square triangular number)

Number of square-triangle has the properties of a square and a triangular number.          
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Freezing sea water

Calculator based on the average salinity of the basin are calculated freezing point of the water content by the formula Krummel.        
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Combustion Calculator - L/100km <-> MPG (U.S.)

Calculator allows the conversion of fuel combustion km / h on U.S. MPG (Miles per Gallon) and vice versa.                      
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Illness Calculator - Calculate sickness (illness)

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Calculator calculates sick pay during sick leave, taking into account the various reasons for absence.              
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ROCE - an indicator of the efficiency of investment

The calculator calculates ROCE on the basis of these pre-tax profits, total capital and current liabilities ROCE (called Return On Capital Employed) - an indicator of the efficiency and profitability of the investment, which is the capital of the company involved.