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Calculator based on the specified time from seeing lightning until you hear thunder in the distance calculated discharge occurred.          

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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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Unit Converter glucose (blood sugar)

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Weighted average ratings

The calculator calculates the weighted average of the ratings of the following items.              
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Calculator floor panels

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Calculator allows you to verify the correctness of the entered account number.