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Field and volume of a sphere

Calculator by entering the radius of the sphere is calculated its surface and volume.      


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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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Area of ​​a triangle using Heron's formula

calculator calculates the area of ​​a triangle after a length of three sides.                
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Calculator - dosage of CO2 in the aquarium

Ile co2 w akwarium? Dawkowanie co2 w akwarium.
The online calculator by entering the pH and kH values ​​to calculate the concentration of CO2 in the aquarium.                
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Core area

The calculator calculates the optimal surface for the heat sink temperature indicator.
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Interest Calculator own (contractual)

The calculator calculates the amount of interest your / contract on the basis of the facts and the required payment date and the amount and percentage rate (annual, monthly, daily).
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Tax Interest Calculator in Poland

Interest Calculator allows you to calculate the tax arrears interest on tax arrears after the date on which the payment should be paid and the actual date of payment.