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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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Insulation of wall

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Medical

Unit Converter glucose (blood sugar)

converter converts the blood sugar level in milligrams per deciliter (mg / dL) in millimoles per liter (mmol / L) and vice versa. http://pl.wikipedia.org/wiki/Glikemia      
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Health

Maximum Heart Rate

The calculator allows you to calculate the index of maximum heart rate (MHR) for your body
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Limit calculator, which entitles them to exemption from VAT in Poland

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.
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Verifiers

Verifier ISMN numbers

Calculator allows you to verify the number entered ISMN (International Standard Serial Number Printing music).