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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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Rainwater tank

The calculator calculates the amount of collected rainwater from the roof of the given dimensions. Long description      
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Calculate how much you drink pure ethanol

On the basis of the data entered, the amount of drink and the percentage of alcohol content calculator calculates pure ethyl alcohol that we consume.
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Battery charging time calculator

Calculator to the data calculates the estimated time of charging.            
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PV Calculator - The present value of the investment

PV Calculator helps us to calculate the current value of the investment or PV (ang.present value). PV Calculator calculates how much you need today, in the future, get the specified value after a certain number of years and accrue interest payable under the assumption that they will be capitalized (added to the principal) at a specified interval.                          
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Area of a parallelogram

The calculator can calculate the area of a parallelogram.
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Calculator ARP (annual percentage rate)

calculator to input the loan amount, the amount of commission (percentage) and the repayment time is calculated the annual interest rate.              
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Calculator social security contributions - the calculation of rates in Poland

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Calculator to calculate gross salary given social security contributions deducted from the salary of the employee and the employer. [since 2008]            
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Purchase price / sales tax bill

Financial Calculator will calculate the price of the purchase or sale of Treasury bills and the amount and an annual discount rate.