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Calculator spending on cigarettes

Calculator based on the price quoted for the package and the amount consumed per month package, gives the annual cost of smoking cigarettes.

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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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Law Gay-Lussac

Calculator based on the programmed temperature and pressure values ​​are calculated using the selected parameter Gay-Lussac law.
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Weighted average ratings

The calculator calculates the weighted average of the ratings of the following items.              
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Number of wallpapers

Jak oszacować niezbędną ilość tapety?
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Jak obliczyć ilość tapety potrzebną do wytapetowania pokoju?
Calculator to estimate the necessary amount of wallpaper needed to wytapetowania room of the given dimensions.    
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Oxygenation index calculator

Calculator to the data calculated oxygenation index and provides the basis for health information. Oxygenation index (PaO2/FiO2) - the ratio of partial pressure of oxygen in arterial blood and the content of inspired oxygen (oxygen content represented in decimal form). Used in the assessment of respiratory function of the human body.                  
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Rainwater tank

The calculator calculates the amount of collected rainwater from the roof of the given dimensions. Long description